How do I configure a domain to use an external mail server in Parallels Plesk?
You should set the domain's MX record to point to an external mail server. Set a high priority for it. Then, in the domain's mail section, click the ON/OFF button to turn the domain's mail service off.
Note :Since remote mailserver functionality is not supported by Plesk, all instances of that domain must be removed from the
rcpthosts files located in the
/usr/local/psa/qmail/control/ directory. These files are located in the
/var/qmail/control/ directory for the RPM build.
Once the changes have been made, Qmail needs to be stopped then restarted.
For additional information on configuring SMTP routes in Qmail server, see Parallels Knowledgebase article #213927985