Tutorials
Guides and tutorials for email servers, authentication, and deliverability.
Email Delivery Troubleshooting: Why Your Emails Go to Spam (and How to Fix It)
Systematic guide to diagnosing and fixing email deliverability problems — from IP blacklists and missing DNS records to spam score analysis and bounce handling.
Build a Complete Mail Server: Postfix + Dovecot on Ubuntu 22.04
End-to-end guide to building a production-ready self-hosted mail server with Postfix (SMTP), Dovecot (IMAP), TLS, SPF, DKIM, DMARC, and virtual mailboxes.
Email Authentication Explained: SPF, DKIM, and DMARC
Learn how SPF, DKIM, and DMARC protect your domain from email spoofing and improve deliverability. Includes DNS record examples and step-by-step setup with Postfix and OpenDKIM.
Setting Up Dovecot: IMAP and POP3 Server on Ubuntu
Complete guide to installing Dovecot on Ubuntu, configuring IMAP/POP3 access, Maildir storage, and integrating with Postfix for a full self-hosted mail stack.
Getting Started with Postfix: Install and Configure an MTA on Ubuntu
Step-by-step guide to installing and configuring Postfix as a Mail Transfer Agent on Ubuntu 22.04 — from package install to sending your first test email.