Postfix vs OpenSMTPD: Which Mail Transfer Agent Is Better for Linux VPS?
Compare Postfix and OpenSMTPD on a Linux VPS. Learn how their configuration styles, authentication, filtering, queues, and security requirements differ—and which mail…
Tag: Postfix
How to Rotate DKIM Signing Keys on a Linux Mail Server Without Interrupting Email
Learn how to rotate DKIM signing keys on a Linux mail server without breaking email authentication. Generate a new selector, publish DNS,…
How to Protect a Linux SMTP VPS from Brute-Force Attacks Using Fail2ban
Learn how to protect a Linux SMTP VPS from brute-force attacks with Fail2ban. Secure Postfix, Dovecot, and SSH, test jail settings, monitor…
How to Connect a Self-Hosted Help Desk to an SMTP VPS for Ticket Notifications
Learn how to connect a self-hosted help desk to an SMTP VPS. Configure secure sending in osTicket, enable customer and agent alerts,…
SMTP VPS Prelaunch Checklist: 12 Tests to Run Before Sending Production Emails
Prepare your SMTP VPS for production with 12 essential tests. Check port 25, secure submission, SPF, DKIM, DMARC, sender reputation, inbox delivery,…