Postfix Jobs

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Fixed-Price - Expert ($$$) - Est. Budget: $50 - Posted
I want a mailserver expert to check and setup mailserver for me. I have already done many steps, but it does not work. Need a expert on SSL, I have already generated a certificate. Please apply if you are expert on mail servers on Debian. I have https(this works already) working and the SSL on emails(this does not work). I want a step by step guide on how to do it perfectly. I already have links for the VPS provider, but need final version.
Skills: Postfix SMTP Server Dovecot Email Deliverability Linux System Administration
Fixed Price Budget - Intermediate ($$) - $2,000 to $4,000 - Posted
Website and toolset development Ruby and Ruby on Rails as the primary skillset Go language and NodeJS framework as the supporting infrastructure Familiarity with modern frontend and desktop Javascript toolchain (webpack, ReactJS, Redux, Electron) MySQL database as the primary storage, Redis and AMQ as secondary buses Server and infrastructure maintenance Linux administration skills Strong understanding of Linux-based web application stacks, performance optimisation and DDoS mitigation Postfix knowledge for email servers maintenance
Skills: JavaScript jQuery MySQL Administration
Hourly - Intermediate ($$) - Est. Time: 1 to 3 months, Less than 10 hrs/week - Posted
We are looking for an experienced email server administrator to help us design, setup and optimize an email infrastructure for our internal use and external clients based on Postfix (or eventually sendmail). Additionnally we plan to install a webmail solution such as Group Office, Zimbra, Roundcube, etc. for use.
Hourly - Entry Level ($) - Est. Time: Less than 1 week, 10-30 hrs/week - Posted
I have an issue where app cannot send mail to an account hosted at gmail , I can send mail from my app to any external emails . I need a postfix expert on ubuntu Sep 16 00:47:43 postfix/smtpd[31142]: NOQUEUE: reject: RCPT from localhost[]: 550 5.1.1 <>: Recipient address rejected: User unknown in local recipient table; from=<> to=<> proto=ESMTP helo=<machinename>
Skills: Postfix SMTP Server Ubuntu
Fixed-Price - Intermediate ($$) - Est. Budget: $50 - Posted
I run a Plesk server (on debian 8) with several domains on it and several of my clients use it. Every other day Hotmail, sky protect and zen spamhaus keep listing my IP, I manually get it removed but it comes back within 2-3 days, no other spam providers seem to be picking my server up and listing it , just these 3. I need someone with more knowledge than me to work out why i'm getting listed and help me resolve the problem. I've got back scatter bounces turned off for domains i host, but if anyone tries to send an email to a domain not on my server then it creates a bounce back, I don't know if this is the reason for the problem or something else ? I have SPF on all domains, I have rDNS setup for the primary domain of the server. I'm using a static IP address in a data center not a dynamic or assigned ISP address. Thanks
Skills: Postfix SMTP Server Debian OS Linux System Administration Plesk