mail issue between 2 domains in Plesk

[iHuman]

- domain1.com is hosted on the server. email is hosted an external email server
- domain2.com is hosted on the server and email is also hosted on the server

If an email is sent from domain1 to domain2 - nothing happens. It is never received. It is as if Plesk is saying, this domain is on my server, but I don't handle email for it, so domain2 - you can't receive it.

How can this be fixed?

thanks!

 

[UFHH01]

You should consider watching the mail-logs for this issue, because your thoughts are not really based on facts and don't work this way in a "normal" configuration.
If you wonder where you may found logs and stuff, just visit Parallels Plesk Panel for Linux services logs and configuration files ( KB : 111283 )

 

[iHuman]

I checked the logs and there were no errors, which was the confusing part. I decided to try another approach and contacted the external email hosting provider. After a fair amount of troubleshooting, I realized the external provider was forcing the MX records for domain2.com - which was previously hosted on their server. This was the reason it didn't work. Once they removed the forced MX records, it started working correctly.

thanks for your assistance!