I recently migrated from VPS at Go Daddy to VPS at Liquid Web. After overcoming some general email issues, probably how the MX was pointing, I found that all of the transactional emails through Manbdrill had stopped.

In the Go Daddy version, it was very straight forward. In the ACP, under Email Settings and Advanced Settings, I had SMTP selected and then all the fields filled in with the host, protocol, port, and username/password. All worked great. After the migration, it all stopped. Liquid Web support was not super helpful so I used a freelancer who has helped me with Exchange email setup.

His decision: revert the settings to PHP in the ACP and do the configuration from the Plesk side to send the transactional emails using remote SMTP.

What do you think about that?

 

His decision: revert the settings to PHP in the ACP and do the configuration from the Plesk side to send the transactional emails using remote SMTP.

If you're using SMTP, the configuration in the ACP -> System -> Email Settings would be able to handle it as SMTP uses the exact same settings in PHP configuration. They just really overcomplicated it IMO. However, either will work at the end of the day.