Useful Qmail Commands
This post discussing some useful Qmail Commands. It will help to troubleshoot the email issues on a Qmail server.
Category - Mail Servers
socket bind() to port 25 for address (any IPv4) failed: Address already in use socket bind() to port 25 for address (any IPv4) failed: Address already in use:...
Block outgoing email of a domain in Plesk – Postfix
This post explains how to Block outgoing email of a domain in Plesk using Postfix mail server.
Useful Exim commands
This post lists some useful Exim commands which will help you to troubleshoot Exim email issues.
Useful Postfix commands
This post lists some useful Postfix commands which will help you to troubleshoot Postfix email issues.