sudo journalctl -u postfix -f # systemd systems
| MTA | Best for | Config style | |------|----------|----------------| | | Security, performance, modularity | main.cf , master.cf | | Exim | Flexibility, complex routing | Single .conf (like exim4) | | Sendmail | Legacy systems | .mc → .cf (macros) | mta sa linux
Configure /etc/msmtprc :
For on Linux , a highly useful feature for server owners is a systemd service manager . This feature ensures your server starts automatically on boot and restarts itself instantly if it crashes. Key Benefits sudo journalctl -u postfix -f # systemd systems
Generate a self-signed certificate (or use Let’s Encrypt): modularity | main.cf