Upwork home
Sign up
Secondary

Hire the best Postfix SMTP Server specialists

Check out Postfix SMTP Server specialists with the skills you need for your next job.
Hire freelancers
Clients rate Postfix SMTP Server specialists
Rating is 4.9 out of 5.
4.9/5
based on 207 client reviews
  2. Development & IT Talent
  3. System Administrators
  4. (Current) Postfix SMTP Server Specialists
  • $60 hourly

    • 4.9/5
    • (109 jobs)
    Hello, my name is Andrii. In my childhood, I spent a lot of time with a soldering iron, making different interesting things. At high school, I got a PC at home and started... Dos, Win, Linux, FreeBSD. At the present time, I have more than 20 years of Win experience and more than 16 years of *nix experience. I like to build systems and solve interesting issues. OS - FreeBSD, Linux (CentOS, Alma, Rocky, RHEL, Ubuntu, Debian, Gentoo, etc), Windows (3.1-2019) Virtualization - vSphere 5.x, 6.x. Standalone ESXi and clusters with SAN storages (iSCSI). KVM, Proxmox, oVirt. Veeam BnR, XSI-backup. VmWare Workstation, VirtualBox. Web servers - Apache, Nginx, Lighttpd, Tomcat DB servers - MySQL, MariaDB, Postgresql, MongoDB Mail - Postfix, Courier/Dovecot/Cyrus, Rspamd, Postgrey, Clamav, PostfixAdmin, SquirrelMail, Roundcube, Sendy, AWS SES. I have experience with WHM/cPanel, Plesk, VestaCP, Virtualmin, ISPmanager, but I don't like control panels (most projects are optimized for best performance, and there is no place for CP). If needed, I can learn and work with any control panel. Samba3+LDAP, Samba4 domains (about 500 user accounts, GPO, Roaming profiles, a lot of other stuff). Standalone samba servers. Docker, docker-compose, Jenkins, Ansible. FreeNAS, TrueNas. Squid (LDAP auth, AD auth, basic auth, Kerberos), FTP, SFTP, DHCPD, BIND, TFTP, DAViCal, tinc, mpd5, quagga, BGP, NFS, rsync, snapshot, rclone, Zabbix, SVN, GIT, Moodle, NextCloud, OnlyOffice, BigBlueButton, Caddy, etc. Dell servers, Dell PowerVault MD storages, HP servers, SuperMicro servers, and usual PC hardware. HP, 3Com, Dell switches, no Cisco experience. DD-WRT, including cross-compiling software from sources for this firmware for ARM arch. Shell, PHP scripting I have a lot of other expertise. Feel free to ask.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    KVM Virtualization
    Dovecot
    Debian
    Ubuntu
    CentOS
    Linux
    Windows Administration
    PostgreSQL
    MySQL
    DNS
    NGINX
    VMware Administration
    Linux System Administration
    FreeBSD
  • $40 hourly

    • 5.0/5
    • (360 jobs)
    More than 15 years of working experience in networking and server administration. Administering and scripting networking applications, database applications, web applications and internet & intranet servers In position of expert engineer for networking infrastructure, IT security expert and senior linux/windows/OSX administrator In charge of designing of LAN/MAN/WAN networking infrastructure, designing and implementation of fiberoptic backbone and copper networking installation. Administration of linux servers and networking devices (switches, routers, firewalls, NAS) am in charge of more than 150 linux servers, both physical and virtual Working with L2/L3 switches, routers, firewalls, NAS devices, switching&routing protocols (RIP, OSPF, SNMP, IGRP/EIGRP, VTP, BGP). Certified Cisco and Mikrotik networking engineer. OS platforms - Red Hat/Centos, Debian/Ubuntu, Gentoo, OpenSolaris, BSD flavors, Windows, OSX Server. Networking equipment - Cisco, HP, Mikrotik, ZTE, Huawei Some of the open-source technologies and daemons I have experience with: - bash, perl and python scripting - apache/nginx web servers (standalone, or in backend mode for tomcat, with one or many virtual hosts) - mysql/postgresql database installation and administration - squid (with or without dansguardian+clamav as content filter/realtime AV) - cloud (openstack, AWS, Azure, gcloud, OVH, rackspace, digital ocean....) - snort (with BASE and Snorby as web GUI) and suricata IDS - iptables (with or without web GUI) - BIND (standalone or master/slave) - postfix (as MTA, combined with alot of different tools such as spamassassin, amavis, clamav, roundcube, postfixadmin, dovecot, cluebringer, mailgraph) - zenoss, zabbix and cacti (with plugins and OUIs) - dovecot (as pop3/imap server of choice, combined with postfix and amavis, clamav, roundcube, postfixadmin, spamassassin) - amavis (with alot of customized settings for things such as double AV scanning, DKIM support, catching of spam headers...) - spamassassin (standard and heuristic bayesian analysis, fine tuning of scoring, OCR integration, SPF integration....) - ClamAV (using both standard and unofficial virus definitions, making of 0-day virus signatures caught in the wild...) - freeradius (with MySQL backend for AAA) - samba (in all possible variatons - standalone simple CIFS sharing, member of windows AD, standalone AD controller, one of the controllers in windows AD) - pureftpd, vsftpd and proftpd (as standalone servers or with virtual users) - xen, vmware, hyperv and kvm virtualization (stock or Xenserver/Proxmox distributions) - asterisk (via Elastix linux distribution) - roundcube as preferred web-mail interface (with alot of customized plugins) - openmediavault/openfiler linux distros for NAS - HA clustering (failover based on DRBD and heartbeat/pacemaker+corosync) - NUT (daemon for UPS monitoring and controlling) - openvpn (with various configurations and backends) - pptp vpns (with various configs and backends) - all kind of linux distributions - RH, CentOS, openSuSe, Debian, Ubuntu, Gentoo, Arch.... - hardening of linux distributions (iptables, fail2bain, allow/deny mechanism, AIDE, SELinux, AppArmour, occasional pen testing) - puppet automation - rancid (centralized backup of config files) - bacula, urbackup and rsync backup
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Cluster Computing
    Plesk
    Citrix Hypervisor
    MikroTik RouterOS
    Linux System Administration
    Varnish Cache
    MySQL
    cPanel
    NGINX
    Docker
    System Monitoring
    Network Security
    Network Administration
    CentOS
  • $45 hourly

    • 5.0/5
    • (153 jobs)
    Have been working for 12 years in many roles which involves Linux systems administration in Cloud and traditional Datacenters, integration and troubleshooting in different type of industries. I have managed large number of bate-metals, VMs and wide range of applications/software, you name it!. AWS Certified Soltutions Architect, CCNA and Solaris 10 certified. Whats makes me different from others is my strong foundation of system administration and experience which results in quick troubleshooting and quick adoption of new technologies and protocols.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Email Deliverability
    System Administration
    MAILWIZZ
    Mail Server Implementation
    AWS Server Migration
    SMTP
    VPN
    cPanel
    FreeBSD
    Scripting
    Perl
    Email Marketing
    Virtualization
    Linux System Administration
  • $50 hourly

    • 4.8/5
    • (117 jobs)
    ## BIO Over 25 years of experience in IT. Over 20 years experience as Systems/Network Administrator for Internet Service Providers. Designed and implemented networks, including WANs, LANs utilizing wired and wireless technologies. Provided server administration for production SaaS website and eCommerce sites, including PCI DSS security compliance. ## Area of Expertise Operating Systems: Linux, FreeBSD, OpenBSD, RedHat, CentOS, Debian, Ubuntu, OpenSuSE, Windows Server (2000-2008). Routers: Mikrotik, Linux, low-end Cisco, SoHo routers. Networking: wireless, wired, LAN, WAN, switches, cabling. Server Software: Apache, Sendmail, postfix, DNS, bind, dovecot, courier, email, mail server, pop3, IMAP, WordPress, Joomla, bash, shell scripting.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Cloudflare
    MySQL
    Computer Network
    Network Monitoring
    Network Design
    DNS
    Apache Administration
    SMTP
    OpenBSD
    FreeBSD
    Linux System Administration
  • $125 hourly

    • 4.9/5
    • (26 jobs)
    Hello. My name is Ryan Young, and I have always been involved with Linux since the beginning. Lately these days I have been architecting solutions, mainly in the devops space. I am fast, and accurate with strong troubleshooting skills. I use Terraform, Kubernetes, Perl, Bash, Regex, Ansible, and Powershell to automate everything I can. I have built solutions for on-prem, and Cloud environments. Here are just a few projects that I have been involved in. Developed pipelines to automate deployments with ArgoCD and Kubernetes Developed terraform (EKS, Wordpress deployments, and etc) code to ensure least privilege is followed. With pipelines facilitating deployments Stood up Openshift, and pushed through to production. Setup monitoring platforms, such as Zabbix, Nagios, Cloudwatch, and etc I can provide my resume upon request. Thanks, Ryan
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Docker
    Kubernetes
    DNS
    CentOS
    VMware PowerCLI
    VMWare
    Red Hat Enterprise Linux
    Slackware Linux
    Arch Linux
    Linux System Administration
    Linux
    Bash Programming
    Bash
    Perl
  • $25 hourly

    • 4.6/5
    • (51 jobs)
    Meet Rakib, a highly skilled IT professional with over three years of experience in Linux System Administration and a passion for becoming an expert DevOps Engineer. Rakib possesses a comprehensive understanding of various technologies and services, making him an excellent fit for a wide range of IT-related tasks. Expertise: - Proficient in Git, Jenkins, Docker, Nginx, Apache, HAProxy, OpenLiteSpeed, Bash, and Python scripting. - Experienced in Ansible and Terraform automation. - Well-versed in cloud platforms such as AWS, DigitalOcean, and GCP. - Experienced in website and framework development using WordPress, Laravel, Angular, React, and Django. - Knowledgeable in IT monitoring tools such as Prometheus, Grafana, Graylog, ELK, AppDynamics, and Moogsoft. - Experienced in Jira and Google Workspace administration. - Skilled in optimizing the performance of WordPress websites. Services: - CI/CD implementation using Jenkins, Bitbucket, GitHub Actions, and AWS CodePipeline. - IT monitoring and management using Prometheus, Grafana, Graylog, ELK, AppDynamics, and Moogsoft. - AWS administration including EC2, EB, ECS, EKS, Lightsail, route53, LB, RDS, and more. - Web server configuration and optimization on various Linux distributions such as Ubuntu, Debian, CentOS, AlmaLinux, and RockyLinux. - Automation using Ansible, Python, Terraform, and more. - Website and email migration services. - Knowledgeable in WHM cPanel, CWP, Virtualmin, Webmin, Ionos, and FreeSSL. Rakib's commitment to excellence, passion for technology, and drive to become an expert DevOps Engineer make him a valuable asset to any IT project. He is always ready to tackle any IT-related task that comes his way. Contact Rakib today to take advantage of his diverse skillset and experience.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Jenkins
    DevOps
    CI/CD
    GitHub
    Ansible
    Scripting
    Linux System Administration
    AppDynamics
    Automation
    Kubernetes
    Docker
    Grafana
    cPanel
  • $25 hourly

    • 5.0/5
    • (29 jobs)
    ⚡️Top Rated Freelancer with 10+ Years of Experience in ISP Industries. ⚡️SMTP Smarthost Consultant, Google Cloud ⚡️Manager & Team Leader, System Administration, Amber IT Ltd. ⚡️Customer Satisfaction Guaranteed Hi I am shuvo and I am a professional system administrator working at one of the prominent IT company in Bangladesh. I have 8+ years of server administration/network administration experience. My day to day job at my company are configuring and troubleshooting mail server (Zimbra/Postfix/Sendmail etc). Email blacklisting check , network abuse check. To list some more, Web server, DNS server, Cacti server, Samba, iSCSI Server, NFS and so on. I can also work in virtualization like hyperV, vmWare ESXi (5.5, 6, 6.5) with vCenter, KVM etc. I can also work with Cisco Systems Routing/Switching, Mikrotik. I have completed some professional certifications from Cisco, Redhat.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    SMTP
    Email Security
    Email Deliverability
    Proxmox VE
    Marketing Automation
    Email Marketing Strategy
    Email Campaign Setup
    MAILWIZZ
    Zabbix
    Linux System Administration
    Zimbra Administration
    Server Virtualization
    DNS
    cPanel
  • $112 hourly

    • 5.0/5
    • (43 jobs)
    I am experienced Linux Embedded Programmer, Linux/ARM BSP/firmware engineer (16+ years). Easily can adapt to new environments, excellent team-worker, especially in software development. Seven years of experience in 4G – next generation wireless development. Experience with Agile methodologies of product development. Experience with WiMAX and LTE protocols stacks, LTE EPC protocols, LTE eNB - EPC protocols, various EPC and EPC emulation software (vendors: Aricent, PolarisNetworks, Radisys/Trillium). Solid experience in NTP/SNTP/PTPv2 (IEEE 1588v2) network time synchronization protocols. Leaded development of complete 4G solution(MaxBridge) from start to completion, final product deployed in four countries. Experienced in Linux kernel device drivers/4G MAC-level programming and code optimization. Experienced in MAC-PHY communication. 4G QoS implementation and resource optimization. Experience in traffic convergence/encapsulation. Extensive experience in installation and administration of most common network OS and network security. Solid experience in building Video surveillance and event registration with precision time keeping devices, BSP optimization for AI on the Edge. Solid experience with BSP/kernel/drivers development/optimization for the small Linux SoC boards, such as Raspberry PI, Nano Pi etc. Can provide consulting service on remote work organization, DevOps tasks, moving infrastructure to a cloud, company email solutions.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Adobe Photoshop
    Product Photography
    Firmware Programming
    Firmware
    Kernel
    Driver Development
    DNS
    Embedded System
    System Programming
    Embedded Linux
    C
    Wireless Communication
    System Analysis
    Email Deliverability
  • $30 hourly

    • 5.0/5
    • (8 jobs)
    4 years as a Linux System Administrator with DevOps background with 3 year experience in the area. Reliable, hardworking, sociable. Ready to meet new challenges and get more experience as freelancer.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Web Host Manager
    cPanel
    Deployment Automation
    Docker
    Apache HTTP Server
    DevOps
    CentOS
    CI/CD
    LAMP Administration
    Apache
    Dovecot
    Linux System Administration
    NGINX
    MySQL
  • $100 hourly

    • 5.0/5
    • (11 jobs)
    I'm an experienced PHP web developer, mostly working with WordPress systems and plain PHP applications. I've been building a web hosting platform from scratch and gained a lot of experience in server administration and securing a web server by doing so. Managing servers, email services and developing new web projects is what I thrive on. I like optimizing systems for performance and getting the best out of what I have.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Ubuntu
    Email Deliverability
    Linux
    Performance Optimization
    Apache HTTP Server
    WordPress Malware Removal
    DNS
    Linux System Administration
    WordPress Development
    SSL
    Let's Encrypt
    WordPress
    CSS
    JavaScript
    PHP
  • $50 hourly

    • 5.0/5
    • (180 jobs)
    Over the last 10 years, i have worked on E-mail marketing industry, using Linux based email server, Implementation, Managing and troubleshooting of systems like PowerMTA, with various Email Marketer like - Interspire, Mumara, Mailwizz and all possible email authentications like SPF, rDNS, DKIM, DMARC DNS Servers, Mail Servers, Database Servers, Proxy Servers, Web Servers, FTP Servers, DHCP Servers, SSL, Streaming Servers, Firewall, Bandwidth Controllers, VPN and others related to networks. Also, i have huge experience with third party SMTP provider like Klaviyo, AWS-SES, Mailgun, SparkPost, SendGrid, MailChimp, SMTP2GO, GetResponce, AWEBER, SMTP.COM etc.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    SendGrid
    Mailgun
    Klaviyo
    Email Campaign Setup
    Linux System Administration
    Email Marketing Consultation
    Mail Server Implementation
    Interspire
    MAILWIZZ
    Email Marketing Strategy
    Email List
    Email Security
    Email Marketing
    Affiliate Marketing
    Email Deliverability
  • $45 hourly

    • 4.9/5
    • (116 jobs)
    I'm an administrator for Linux systems with solid industry experience. I can: ✓ Setup servers. Optionally install and configure a control panel. ✓ Harden server for high security and compliance requirements. ✓ Optimize server for speed and stability. ✓ Setup DNS cluster for auto-replication and redundancy. ✓ Improve email deliverability (SPF/DKIM/DMARC/IP Reputation Management). ✓ Install SSL certificates, configure Firewall, and fail2ban/LFD for brute force protection. ✓ Perform server security audit and hardening, according to industry best practices. ✓ Configure backups (scheduled/real-time). Plan and execute Disaster Recovery. ✓ Plan and perform server migration. Migrate websites. ✓ Setup Content Delivery Network (CDN) and Web Application Firewall (WAF). ✓ Mitigate DDoS attacks using NGINX/Apache, fail2ban, CSF and iptables. ✓ Install and configure Apache, NGINX (as a backend or reverse proxy), Varnish cache, Redis, Memcached, and PHP Opcache for optimal performance and high traffic. I'm proficient in the management of: • Operating Systems: CentOS, RHEL, Debian, CloudLinux, Ubuntu, Windows Server, Linux. • Commercial Control Panels: cPanel/WHM, Plesk, DirectAdmin, InterWorx, ISPmanager. • Free Control Panels: VestaCP, ISPConfig, CentOS Web Panel, Webmin, Ajenti, Froxlor. • Content Management Systems: WordPress, Drupal, Magento, Joomla. • Server Stacks: Apache, NGINX, PHP-FPM, MySQL, MariaDB. • Email software: Exim, Postfix, Dovecot, SpamAssassin, RBL. • Server Software: JetBackup, rsync, lsyncd, rclone, Linux Malware Detect. • Cloud/Server Security Solutions and CDN: Cloudflare, Sucuri, Imperva, ModSecurity. • Anti-SPAM gateway and software: Scrollout F1, EFA (Email Filter Appliance), MailScanner • Cloud Services: Amazon Web Services, Microsoft Azure, HP Helion Cloud, Digital Ocean, Linode, Rackspace, Softlayer, Google Cloud Platform (and many more!). I'm enthusiastic, highly focused, and dedicated to my work. I'm always ready to go above and beyond the call of duty. I know that communication is the key to success; if you have any questions or are ready to begin, please do reach out to know how I can help.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    CentOS
    DevOps
    MySQL
    cPanel
    Web Hosting
    Cloud Security
    Cloud Management
    System Maintenance
    System Installation & Upgrades
    System Security
    System Monitoring
    System Administration
    NGINX
    Apache Administration
    Linux System Administration
  • $36 hourly

    • 5.0/5
    • (22 jobs)
    If you are a perfectionist, you have come to the right person! I am a Linux/Windows System Administrator with 18+ years in multiple roles involving integration and troubleshooting in different industries. I have managed many bare metals, VMs, Cloud, and a wide range of applications/software; you name it! My strong foundation of system administration and experience makes me different from others, resulting in quick troubleshooting and the quick adoption of new technologies and protocols. My stack list: • CI/CD • Docker • Jenkins • DevSecOps • Amazon Web Services (AWS): EC2, ECS, S3, IAM, Lambda, Route 53, CloudFront, CloudFormation, RDS, etc.; • Automated Tests • Architecture Solutions • Terraform • Kubernetes • Ansible • Apache, Tomcat, and Nginx • Git/SVN • Linux (Ubuntu/RedHat/CentOS) • Bash Script • Powershell • SQL/ NoSQL • Programming Languages (Python, Java, PHP, NodeJS, Ruby) • Network Protocols • LiteSpeed, CyberPanel • Apache, CPanel, MySQL, and its replications, • Bind, PowerDNS, NFS, VPN server like POPTop, OpenVPN Email: PMTA, Postfix, Oempro, 12all, Interspire, Mailwhizz, SMTP Sendmail, Postfix, Power MTA ) DKIM, SPF, DMARC, Open relay, POP/IMAP, Dovecot, FTP Vsftpd, Proftpd, etc
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Cloudflare
    OSPF
    AWS CloudFormation
    Server
    Linux System Administration
    SpamAssassin
    DevOps
    Email Support
    Email Deliverability
    Virtualization
    Amazon EC2
    LAMP Administration
    System Monitoring
    NGINX
  • $35 hourly

    • 5.0/5
    • (395 jobs)
    I have done Bachelor of Computer Science and Engineering from Daffodil International University. Having a Computer Science degree and being a self-learner, I learned Cloud Technologies and Information Security all by myself. I have over seven years of professional experience in the field of Network, Server-Side work, System Administration, also vast experience in configuring Amazon Web Services. Along with Network & System Administration, Microservice design, and development, I have expertise in multiple areas. Here is the list of my expertise area: • Cloud Service Amazon Web Service | Azure | Google Cloud | IBM Cloud | Digital Ocean | Vultr | Linode | UpCloud | Hetzner | Scaleway • Amazon Web Services (AWS) EC2 | ECS | RDS | S3 | Route 53 | IAM | Cloud Watch | SES | SNS | ELB | Certificate Manager | VPC | Glacier | Autoscaling | CodeCommit | CodePipeline | Guard Duty | Elastic Beanstalk | CloudFront • System Administration Windows Server | Linux Server | KVM | OpenVZ | Xen | VMware ESXI | Hyper-V | Server Migration | Server Monitoring | Server Management | Server Optimization | 3CX | Twilio Elastic SIP • CMS WordPress | WordPress Migration | WordPress Speed Optimization | WordPress HA | Ghost | Medium | Laravel Installation | Laravel Site Migration • Database MongoDB | PostgresSQL | MySQL | MariaDB | DB Optimization • Windows Server Active Directory | Group Policy | IIS | Exchange | DNS Server | RRAS | Windows Firewall • Linux Nginx | Apache | MySQL | PHP | UFW | Iptables | Git | Let’s Encrypt | OpenVPN | SoftEther | MariaDB | Dovecot | Fail2Ban | Grafana | LEMP | LAMP | WireGuard | Redis | Docker • Cloud Tools CyberPanel | Lite Speed | RunCloud | CloudWays | GridPane | Ploi | Plesk | cPanel l Virtualmin | Webmin • Networking Cisco Routing and Switching | Mikrotik | OpenWRT | Generic Router | VPN • Mail Server Setup and Management Postfix | SendMail | Amazon SES | MailWizz | Mandrill | SendGrid | Server Blacklisting and Bounce Management | Sendy | SPF | DKIM | DMARC | MailGun | Sendinblue • Workspace Amazon Workspace | Google Workspace | Office365 | AzureAD | AWS AD | Zoho Workspace | Zoho Mail | Proton Mail | NextCloud | OwnCloud I have the following certifications: • Certified Ethical Hacker v9 • Google Cloud Essential • AWS Certified Solutions Architect – Associate • Microsoft Certified Solutions Associate • Google AdWords • Google Mobile Site I do like the creative projects, as part of this I'm doing development in IoT-based firmware and devices. I have good experience with Linux-based platforms. Have developed many infrastructures for my clients. I would like to put my learning into practice. Looking forward to providing the best service in AWS DevOps, Solution Architect, Ethical Hacking, SysOps Administration Areas.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Computer Engineering
    Email Campaign Setup
    OpenWrt
    Page Speed Optimization
    Technical Support
    Google Workspace Administration
    Email Deliverability
    IT Service Management
    WordPress
    Amazon EC2
    VMware ESX Server
    Linux System Administration
    Amazon Web Services
    System Administration
    Office 365
  • $20 hourly

    • 4.1/5
    • (85 jobs)
    Ⓜ️ Upwork Preferred Freelancer ---------------------------------------------------------------- ✅ Top Email Marketer ✅ 100% Client Recommended I like working on anything revolves around the IT ecosystem, and find the most fun in troubleshooting problems and working around strict requirements and deadlines. My main skill is discovering the root cause of a problem and working out the best solution in a very short time. I am a very fast learner and have a vast skill set to assist in any kind of necessity, as long as it runs on a computer. 1. Email Delivery Expert a. PowerMTA b. MailerQ c. Postal MTA d. Sendmail e. Haraka f. Postfix g. Zone MTA g-a Hmailserver h. Authentication (DKIM, SPF, RDNS,FDNS, DMARC, Sender Reputation) i . Load balancing ***************************************************** 2. Cloud Delivery Platform a. opennebula b. OpenStack c. CloudStack d. Eucalyptus e. openQRM f. Cloud Foundry ***************************************************** 3. Cloud Telephony a. Kannel (SMS, Email to SMS, Fax) b. Asterisk (inbound & Outbound calling, Call Center Management) c. Freepbx d. A2Billing f. SMPP g .ASTPP ***************************************************** 4. DNS Management a. web hosting b. cloud hosting c. Domain DNS Management ***************************************************** 5. Marketing Management a. Email Marketing b. Marketing Automation c. Drip Campaigns d. Campaign Optimization (Adwords, Yahoo PPC, Facebook , Linkedin , Twitter) e. Mobile Marketing f. klaviyo (campaign management , segmentation)
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    PHP
    Linux System Administration
    Email Marketing
    Mautic
    SMPP
    Email Deliverability
    Search Engine Optimization
    SMS Gateway
    Internet Marketing
    Interspire
    Bulk Marketing
    Mail Server Implementation
    SMTP
    DNS
  • $30 hourly

    • 4.9/5
    • (58 jobs)
    I am a Red Hat Certified Engineer (RHCSA & RHCE ) & working more than 7 years of professional in Linux Server. Experienced Linux Server with a demonstrated history of working in the IT & IT security. Skilled in Email Server, Web-server, and script install ,Oracle Database, MariaDB, MySQL, Kali Linux, Linux System Administration, and Bulk Email Marketing.I have experience in fixing issues of Linux Servers. I will fix any issues related Linux, MySQL, Apache, DNS, Nginx, WordPress, PHP upgrade, Dedicated server , VPS server related issues. Strong engineering professional with a Master's degree focused in Computer Science and Engineering. My System Administration Skills Include: - Virtualization Support: Proxmox VE, KVM, QEMU, Hyper-V, OpenVZ, VirtualBox, Virtuozzo, VMware, Vagrant - Cloud Support providers: Digital Ocean, Vultr, Linode, Upcloud, AWS, Google Cloud Engine, Azure - Web Servers Support: Nginx, Apache, Lighthttpd, PHP-FPM - Databases Support: MySQL, MariaDB, Percona - Control Panels Support : cPanel, WHM, ISPmanager, Plesk, ISPconfig, Websitepanel/SMBpanel, Virtualmin/Webmin, Ajenti, VestaCP, zPanel - Mail Servers Support:PowerMTA, exim, postfix, dovecot, spamassasin,iRedMail, Zimbra, *** Customer satisfaction my top priority. Looking forward to show my capabilities through my service. *Thanks & Regards* MOSTAFA AL-AMIN Red hat Certified Engineer
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Email Marketing Platform Support
    Web Hosting
    MAILWIZZ
    Linux System Administration
    Mail Server Implementation
    SMTP
    cPanel
    SSL
    Virtual Private Server
    Email Deliverability
    Office 365
    Google Cloud Platform
    Email Marketing
    System Administration
  • $45 hourly

    • 5.0/5
    • (212 jobs)
    DevOps ✅ DigitalOcean/AWS/GCP ✅ cPanel/WHM/Plesk/Virtualmin/VestaCP ✅ Ubuntu/CentOS Last 10 years I have engaged in system administration using Nginx, Apache, PHP, Python and MySQL including sites for startup companies and small businesses. I have extensive experience in the deployment of sites and projects of varying complexity, and I am seeking opportunities to help you to build your business. I have great experience in: 🟢 Hosting providers: 🔸 OVH 🔸 Softlayer 🔸 Hetzner 🔸 AWS 🔸 GoogleCloud 🟢 Cloud Hosting: 🔸 Digitalocean 🔸 Amazon (EC2, AWS, S3) 🔸 Linode 🔸 GoDaddy 🔸 Rackspace 🟢 Docker related stuff 🟢 Docker-compose 🟢 Linux maintenance/troubleshooting: Debian, CentOS, Gentoo, Ubuntu, RHEL etc 🟢 Apache2 + Nginx, Nginx + PHP-fpm, Nginx + PHP-fastcgi, MySQL, Varnish, Memcached. 🟢 Linux serverside: iptables, rsync, Bind, OpenVPN, 🟢 Mail: Exim, Dovecot, Postfix. 🟢 Backup/Migration 🟢 Hosting panels: Plesk, cPanel/WHM, ISP , DirectAdmin, Virtualmin, VestaCP 🟢 Virtualization: Xen, KVM, OpenVZ, Proxmox 🟢 Monitoring: Zabbix, Munin, Cacti, Nagios 🟢 CMS : Wordpress, Drupal, Magento, CS-Cart
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Docker Compose
    DevOps
    Drupal
    WordPress
    Virtual Private Server
    LAMP Administration
    SSL
    DNS
    Amazon Web Services
    Django
    CentOS
    Linux System Administration
    DigitalOcean
    Docker
    NGINX
  • $30 hourly

    • 4.9/5
    • (590 jobs)
    Trustworthy, proactive and performance oriented System Administrator with • 16+ Years experience on Linux and Windows Server Administration • 12+ Years on Cloud Architecture • 10+ Years as Security Expert Experienced in: • Cloud Infrastructure – AWS / Google Cloud (GCP) / MS Azure / DigitalOcean / Rackspace / OVH / Vultr • Web Servers – Apache / IIS / Nginx / Tomcat / HA Proxy • Database Servers: MySQL / MariaDB / MS SQL Server (All Versions) / Galera Cluster • Mail Servers: Postfix / Exim / MS Exchange / Zimbra / Windows SMTP / MailEnable • Hosted Mail System: G-Suite / Office 365 / Yahoo / GoDaddy Mail • Security: SSL/TLS / PCI Compliance / Penetration Testing • Control Panel: WHM/cPanel / Plesk / DirectAdmin / VestaCP / CentosWebPanel • Version Controlling Tools: Git / Subversion • Automation: Puppet / AutoHotKey • CDN: CloudFront / CloudFlare / Incapsula) • Firewall implementation: Cisco / FortiGate / Sonicwall / WatchGuard / CSF
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    DigitalOcean
    WebHost Manager (WHM)
    Mail Server Implementation
    Apache Tomcat
    Microsoft IIS
    Microsoft Office 365 Administration
    Website Migration
    Amazon Web Services
    Azure
    Cloudflare
    TLS1.2
    SSL
    Google Apps
    Microsoft Exchange Server
  • $45 hourly

    • 5.0/5
    • (83 jobs)
    Hi there, I'm a professional system and network administrator with about 20 years experience. I'm a native Russian/Ukrainian speaker and based in Ukraine [UTC+2]. I have a great experience in the following areas: - Data backups, Database/File backups, backup automation, and troubleshooting; - Building and configure mailservers: Postfix, Exim, Sendmail, Mailcow; - Database server administration: MySQL, MariaDB, PostgreSQL; - Management and performance tuning: Samba, Apache, NginX, Squid, Tcpfoss & etc.; - Monitoring: Zabbix, Munin, Icinga, Nagios, Grafana, Influxdb, Prometheus, New Relic, Whisper; - Maintenance/troubleshooting OS's: Linux (CentOS, Ubuntu, Debian, OpenSUSE, AlmaLinux, RockyLinux, NixOS, Armbian, Raspbian, CoreELEC/LibreELEC/AlexELEC); - Deploying and configure VPS based on OS's: CentOS, Debian, Ubuntu, AlmaLinux, Rocky Linux etc. for different purposes; - **Another software**: Moodle, BigBlueButton, Sympa, Jitsi, Eramba, pfSense, RocketChat, Zimbra, Nominatim, ZeroTier, MailCow, hMmail, Elasticsearch, Logstash, Kibana, DokuWiki, SVN, Mantis, Git, WHM/Cpanel, Puppet, Chef, Ansible, Docker, OpenVPN, Wireguard, Tinc, Rsync, Bacula, Spamassasin, Rspamd, Amavisd-new, Phpmyadmin, Postfixadmin, Roundcube, Virtualmin, Webmin, Xen, KVM, OpenVZ, Vagrant, TYPO3, Dovecot, Iptables, BIND, ProFTPd, Zimbra, Vsftpd, Lighttpd, fail2ban... - Hardware experience: Cisco routers, HP switches, Mikrotik routers; - Programming and shell skills: python, bash, zsh, Go; - Cloud services: Paperspace, Perimeter 81, DigitalOcean, AWS, Google Cloud, GoDaddy, OVH, Bluehost, 1&1, Linode, Bitnami, Host Europe, Vultr, Omnis, Hivelocity etc. - Server migration; - Email migration.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    NoSQL Database
    Software Maintenance
    DevOps
    Email Security
    Email Support
    OS Security
    MySQL
    Data Migration
    Server Administration
    Email Deliverability
    Mail Server Implementation
    Linux System Administration
    Server Virtualization
    System Administration
  • $100 hourly

    • 4.8/5
    • (240 jobs)
    Expert in Lead Generation and Cold Email outreach specifically utilizing Hubspot, Apollo and Sendgrid. I am a Sales professional with a demonstrated history of rapid sales growth and scalable business development processes. Highly-skilled in prospecting, Sales Management, Software as a Service (SaaS), Sales Process and new product launch. After all these years, cold email outreach is still one of the very best channels to generate leads and grow sales. The challenge today is creating copy that is unique to everything else that lands in a persons inbox. I have over 12 years of experience in the fast-moving world of lead generation and sales strategies If you are looking to significantly enhance your marketing strategy, sales strategy, and business development, look no further to access specialized knowledge and expertise that you can't find anywhere else.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Sales Strategy
    SendGrid
    Apollo.io
    Drip Marketing
    Cold Calling
    Lead Generation Content Creation
    CRM Software
    Email Marketing Strategy
    Business Development
    Email Campaign Setup
    Outbound Sales
    Business Writing
    SaaS
    Gmail
    Lead Generation
    Sales
    HubSpot
  • $90 hourly

    • 5.0/5
    • (874 jobs)
    I am a veteran DevOps and I love urgent jobs. Time is money for your business, and I strive to resolve problems quickly and efficiently, often within minutes. I optimize servers to handle large volumes of visitors and improve website and application performance. My solutions have saved some of my clients thousands of dollars in infrastructure costs. ⏱ General availability UTC: 7am-9pm, ET: 2am-4pm, PST: 5am-1pm. My expertise: site reliability engineering, high-traffic installations for WordPress, Magento and custom apps, and identifying performance bottlenecks in them. Server speed and load optimization, complex site, email, and domain migrations. Multiple-server architecture designs. Applications containerization and deployment for ECS and Kubernetes. Setting up an automated app, server deployment and testing with GitLab and GitHub CI/CD. Platforms: AWS, Google Cloud, DigitalOcean, Linode, Vultr and others Automatic infrastructure deployment and server provisioning with Terraform and Ansible Kubernetes deployments on AWS/GKE/DigitalOcean SSL / Letsencrypt / PCI DSS Compliance Dovecot / Postfix / Rspamd / SPF / DKIM / Email deliverability Apache / Nginx / Traefik / HAProxy / HTTP2 / PHP-FPM CloudFlare - advanced caching, WAF, workers and other features MySQL / MariaDB / Percona - performance analysis, configuration, complex migrations CPanel / WHM / Plesk / Froxlor Zabbix server monitoring. NewRelic, Blackfire code performance profiling GitLab, GitHub, BitBucket CI/CD pipelines VPN - WireGuard, StrongSwan, OpenVPN Earlier in my career I have been specializing in data recovery for eleven years, working with a wide range of workstations, servers and storage arrays. During this time, I have developed multiple data recovery tools for Windows in C# and for Linux in C and Python and reverse-engineered various software and hardware components.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Cloudflare
    Google Cloud Platform
    Terraform
    New Relic
    Cloud Migration
    Cloud Implementation
    DevOps
    GitLab
    Software Debugging
    Database Administration
    Data Recovery
    Amazon Web Services
    SSL
    Virtual Private Server
    Linux System Administration
  • $60 hourly

    • 5.0/5
    • (118 jobs)
    "Nedzad did an excellent job well within the expected time limits and perfectly done. He managed to achieve what our in-house experts were not able to do" I can: - solve problems you have with your linux dedicated server or VPS - fix problems you have with your dns/perl/git/JavaScript/PHP/Python/node.js code - code the required script to automate your operations - solve problem you have with your website, or with your SSL
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Scripting
    Technical Support
    Email Deliverability
    JavaScript
    Git
    Perl Mojolicious
    Bash Programming
    PerlDancer
    Linux System Administration
    SMTP
    SSL
    WordPress Plugin
    CSS
    WordPress
    Perl
  • $50 hourly

    • 5.0/5
    • (353 jobs)
    I am proficient with all large public cloud - AWS/Azure/GCP, and a few of the smaller ones - Linode/Digitalocean/Scaleway/Hetzner. Kubernetes and nomad are two of my core skills, and containerization tools such as docker and lxd/lxc are workloads I run on those clusters. I practice IaaC, with tools such as cloudformation, terraform, ansible, puppet and saltstack. For creating build and deploy pipelines I use various CI/CD tools, including Jenkins, maven, gitlab CI, circle CI, jenkins. I'm experienced in network design and security, linux administration and DevOps services for AWS/GCP/Digitalocean/Linode. A typical workday for me consists of taking care of production linux systems, monitoring the various server fleets I am responsible for, and make sure the systems are secure from attackers.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    SMTP
    Mail Server Implementation
    Linux System Administration
    DevOps
    Docker
    Cloud Computing
    Containerization
    Email Deliverability
    CI/CD Platform
    Kubernetes
    System Administration
    Linux
    Google Cloud Platform
  • $190 hourly

    • 4.9/5
    • (460 jobs)
    Based on my 30 years of experience in the field of IT, i am able to complete complex tasks of high difficulty. Working in international corporations allowed me to have a practice with productive and expensive systems. Contracts in the banking sector has taught confidentiality and responsibility and the importance of trust. My main qualification is in system administration. From the direct assembly of the server to the configuration of the operating system. Therefore i have expert knowledge of operation systems Windows\UNIX. Server OS: Microsoft Windows server, RedHat, Ubuntu, CentOS, PopOS, Debian, other Linux.. Cloud: Amazon Web Services AWS, Google cloud GCP, Oracle cloud, Microsoft Azure, IBM cloud.. Hosters: Digital Ocean, Hetzner.. Virtualization: Hyper-V, VMWare, VirtualBox, KVM, Proxmox.. Emergency problem resolving. Web, VPN, VPS, Cloud, Virtualization. Hardware troubleshoting and repair. Security networking. Infrastructure protection. BIOS\FW recovering, updating.
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Microsoft Hyper-V Server
    Google Cloud Platform
    System Configuration
    Virtualization
    Amazon EC2
    Microsoft Hyper V
    Data Recovery
    Virtual Private Server
    Hardware Troubleshooting
    Server Virtualization
    Disaster Recovery
    System Administration
    Windows Server
    Linux System Administration
  • $50 hourly

    • 4.9/5
    • (326 jobs)
    I am having more than 10 years of experience in Installing, configuring and administrating various type of *nix servers using various opensource and closed source software for various customer requirement in the industry. My major expert areas in summary:- #Cloud environment :- Amazon Web Services, Google Cloud, DigitalOcean #Email deliverability: PowerMTA, Interspire, MailWizz, Amazon SES #Operating Systems :- Redhat, CentOS, Ubuntu, Dabian, Gentoo, HP-UX, Aix, SunOS,. Windows workstations and Servers 2000, 2003, 2008 R2, etc., #TCP/IP networking :- Advanced ip routing, forwarding, filtering and firewall with Netfilter Iptables #servers :- Sendmail, Postfix, Dovecot, Courier IMAP, Squirrelmail, Roundcube, BIND, Apache, VSFTPD, DHCPD, Squid, Samba #Monitoring and remote admin :- Log analizing with Sarg,Monitoring serves with Nagios and icinga ,Remote desktop with FreeNX, Remote Admin SSh/Telenet #Scripting :- Bash scripting, Perl, Python #Web and Database :- postgresql, MySQL, Oracle HTML #CMS: Drupal, Magento, Wordpress Thank you. Best Regards. Fabrizio
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Email Deliverability
    Server Virtualization
    Docker
    Network Administration
    Dovecot
    Atlassian JIRA
    NGINX
    Mail Server Implementation
    Apache Administration
    LAMP Administration
    Amazon Web Services
    Unix Shell
    Unix System Administration
    Linux System Administration
  • $56 hourly

    • 4.7/5
    • (402 jobs)
    Email Marketing, Bulk Email Marketing, MailWizz, configuring servers for email marketing (DKIM, SPF, DMARC), PowerMTA, MUMARA
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    Interspire
    Perl
    Data Scraping
    Data Mining
    Email Deliverability
    Email Marketing
    Email Handling
  • $200 hourly

    • 4.9/5
    • (264 jobs)
    Services Provided : * Email Deliverability Consultation and Retainer Services (See details below) * Large Scale Email Infrastructure (MTA) Setup, Email Tools Setup * Email Marketing Strategy Consultation * Affiliate Email Marketing Strategy Consultation and Platform Setup * Email campaigns execution and management (retainer plans) with daily/weekly reporting Remember : Email Deliverability (inbox and open rate) is not something which can have a quick fix instead it is a continuous journey. I am a technician not a magician. 1. Email Deliverability * Deliverability Audit Detailed deliverability audits to identify the issues causing emails to go to spam. The audit is very detailed and not just surface checks. The audit covers ESP configuration, spam tests, seed list tests, content tests, data management practices analysis, domain and IP reputation checks, email campaigns execution process analysis, email campaigns history analysis. The audit report covers all identified issues, steps to fix identified issues, long term and short term strategy, tools recommandation, warmup and domain reputation improvement guidance. * Implementation of fixes and recommandations from deliverability audit * Monitoring deliverability KPIs on retainer basis and send weekly deliverability reports * Take all active/reactive measures to ensure healthy email open rates * Implementation of industry best practices * Managing IP and domain reputation (MxToolBox, ReturnPath, EmailonAcid, 250ok etc) * Reducing spam score * Email verification / hygiene * Signing feedback loop with ISP (Google Postmaster, Microsoft SNDS, ReturnPath, Yahoo/AOL) Deliverability and Email Testing Tools: * Validity Everest, and its configuration and integration with feedback loops. * GlockApps, Mail-tester, EmailOnAcid, Litmus * Any other Seed List Testing Tool * Google Postmaster, Microsoft SNDS, ReturnPath feedback loops * Domain and IP Warmup tools 2. Emailing Platform setup : * MTAs (Port25 PowerMTA (PMTA), GreenArrow DRHInternet Engine, MailerQ, EmailSuccess) * PostFix, Zimbra, hMailServer, Postal, iRedMail, DoveCot, RoundCube Emailing Applications setup : * MailWizz, Mumara, Sendy, Mautic, Interspire Third Party System Setup : * Klaviyo * Aweber * Iterable * Mailshake , Reply.io , Klenty , SalesHandy, Snov.io * Gsuite (external SMTP integration for cold emailing, alias domains, DKIM signing) * Office365 (DKIM keys signup, enabling RMS templates, define mailflow rules, Office 365 Advanced Message Encryption, Office 365 Message Encryption OME) * Zoho email * GetResponse * Sendgrid * Mailgun * Elasticemail * Mailchimp , Mandrill * Amazon SES * Sendinblue * Sparkpost * Customer.io * InfusionSoft 3. Other Tools and Skills * DNS with any hosting provider like Cloudflare, GoDaddy, AWS Route 53 (SPF, DKIM, DMARC, reverse DNS) * Self-hosted in-house (on your own infrastructure) IP blacklist monitoring tools * Self-hosted in-house (on your own infrastructure) DMARC analysis tools * Self-hosted in-house (on your own infrastructure) email verification system * Infrastructure / VPS cloud providers setup for email servers and tools * Operating Systems and Virtualisation: CentOS, Ubuntu, RedHat, Windows, VirtualBox, VMWare Hypervisor, Citrix 4. Email list cleaning services (Remove invalid domains, invalid pattern emails, spam traps, bounce removal, setting up SMTP and actually sending emails to all email addresses to verify each address individually). Can help you build and deploy self-hosted email verification system. 5. Management and execution of email campaigns with daily/weekly reporting. (Available on retainer basis)
    vsuc_fltilesrefresh_TrophyIcon Postfix SMTP Server
    MAILWIZZ
    Mailgun
    Email Security
    Lead Generation
    Multiple Email Account Management
    Email Marketing Strategy
    Email Campaign Setup
    Email Security
    DNS
    SMTP
    Mail Server Implementation
    Email Technical Support
    Email Marketing
    Email Deliverability
  • Want to browse more freelancers?
    Sign up

How it works

1. Post a job (it’s free)

Tell us what you need. Provide as many details as possible, but don’t worry about getting it perfect.

2. Talent comes to you

Get qualified proposals within 24 hours, and meet the candidates you’re excited about. Hire as soon as you’re ready.

3. Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

4. Payment simplified

Receive invoices and make payments through Upwork. Only pay for work you authorize.

Trusted by

At A Glance: Postfix

Whether it’s wishing Mom a happy birthday with a celebratory e-card or sending an urgent message to the boss, email is an important part of everyday life and an essential form of communication. An undeliverable email is a breakdown in communication, and when a critical message doesn’t reach its destination, it can send the day into a tailspin. Similarly, an inbox cluttered with potentially virus-laden spam mail causes congestion and makes a computer more vulnerable to malware or other viruses that may be contained within innocuous-looking junk messages. Postfix is a free, open-source mail transfer agent that can help protect users from potentially harmful spam mail by accepting emails only from trusted sources. Postfix runs on a variety of systems, including AIX, BSD, HP-UX, IRIX, Linux, MacOS X, Solaris, Tru64 UNIX, and other UNIX systems. Postfix is particularly useful for businesses, as it allows office users to securely communicate amongst themselves without fear of widespread damage to the network.

A Postfix SMTP server professional can assist you or your business in implementing this valuable, free tool. On Upwork, you’ll be able to browse through a global network of experts who can offer their support in a variety of ways. If you’re having trouble with an existing Postfix system, these professionals can troubleshoot the problem to quickly get you back on track. If you’re looking to install Postfix, any one of the multitude of freelancers you’ll find on Upwork’s global marketplace can help you do so. Or if you simply require help managing Postfix or navigating its features, these specialists are there to help too.

Schedule a call

Looking to hire for long-term or full-time assignments? See how Full-time hiring on Upwork simplifies the process.