- Plesk 12.5 for Linux
- Plesk 12.0 for Linux
Plesk does not forward email from dedicated IP, it sends them through shared server IP. If the email was sent to a domain on dedicated IP, Plesk forwards it from the server's shared IP.
This is Plesk internal issue with ID #PPPM-4223 that was fixed in Plesk Onyx.
Upgrade to the latest Plesk version .