Powermta Configuration Guide Top Jun 2026

To prevent your server from becoming an open relay, you must strictly define who can inject mail into your system.

: Defines how many emails to send before closing and reopening a connection.

: Install on a fresh Linux instance (Ubuntu 20.04+ or CentOS 8+) with no control panels like cPanel. Upload & Install : Upload the .rpm or .deb file to your root directory. powermta configuration guide top

How many are assigned to this server? What volume of email (per hour/day) do you plan to send?

To track which recipient bounced, use Variable Envelope Return Path (VERP). To prevent your server from becoming an open

smtp-service soft-bounce-on-invalid-rcpt yes smtp-service soft-bounce-vs-hard-bounce-after 3

Set use-starttls yes and require-starttls no globally to encrypt all connections to compatible ISPs without dropping mail to outdated servers. Upload & Install : Upload the

# Inside /etc/pmta/config queue-file-root /var/spool/pmta/queue Use code with caution. 8. Monitoring and Maintenance