How to configure MSMTP to use the website domain name instead of the server hostname while sending emails?

Question

• How to configure MSMTP to use the website domain name instead of the server hostname while sending emails?

Answer

It is not possible to adjust MSMTP settings concerning domains via the Plesk GUI yet, however such a feature request already exists and you may vote for it on the following link:

Allow configuration of MSMTP (SMTP relay) – Your Ideas for Plesk

Top-ranked suggestions are likely to be implemented in future versions of Plesk Obsidian.

As workaround, it is possible to configure MSMTP to send messages from a specific email address that belongs to a domain on the Plesk server by following these steps:

1. Log in to Plesk server via SSH

2. Open /etc/msmtprc in text editor and disable auto_from parameter and add from header with desired mail address:

   auto_from off
   from test@example.com

When the auto_from is disabled, it is required to explicitly specify a sender email address via the -f (from) option. For example:

# echo "Test Email" | sendmail -f test@example.com test2@example.com

Warning: Notifications from Plesk will not be sent if from test@example.com is not specified while the with auto_from parameter is disabled. Even with from specified in /etc/msmtprc, it is still required to add the from mail address explicitly as shown in the command above.