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Linux | Mail Server | Postfix

Posted last month

We are building a custom in-house mail server. Our goal is to email tens of thousands of customers daily.

Digital Ocean VPN
Linux OS
DNS records such as MX (Mail Exchange), SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting & Conformance) to improve email deliverability and reduce the likelihood of being flagged as spam.
MTA = Postfix
Dovecot - for incoming mail
Mailman - to mange lists etc
PHPlist
software to handle campaign management, track open rates, clicks, bounces, and manage unsubscribe requests.

Load Balancing: Use load balancers to distribute the email-sending load across multiple servers.

AWS Elastic Load Balancer or Google Cloud Load Balancer for distributing traffic.
Database:

PostgreSQL: For storing email logs, user data, and other metadata.
Redis: For caching and session management to improve performance.
DNS Configuration:

SPF, DKIM, DMARC: Properly configure DNS records to improve email deliverability and reduce spam flags.
Queue Management: Implement robust queue management to handle spikes in email sending.

Prometheus and Grafana: For real-time monitoring of server performance.
ELK Stack (Elasticsearch, Logstash, Kibana): For log management and analysis.
SSL/TLS: Ensure all email communications are encrypted.
Firewalls: Use firewalls (e.g., UFW on Ubuntu) to restrict access to necessary ports only.
Authentication: Implement strong authentication mechanisms for server access and email sending.
CAN-SPAM and GDPR Compliance: Ensure all email practices comply with relevant regulations.



About the client
Member since May 11, 2024

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