Resolved Use a domain for mail only

[nornagest]

I have a server with Plesk Obsidian 18.0.35. This server hosts several domains including mail and everything works perfectly.
Now I would like to use an external domain with this server but only for mail.
Below my situation:
1) the domain mydomain.com is pointed (with A records) to an IP address of another server (xxx.xxx.xxx.xxx) which hosts the website files but NOT the mail of domain;
2) I want to use mydomain.com on plesk server but for mail ONLY and not for host website (alredy hosted on server xxx.xxx.xxx.xxx);
3) I followed this tutorial (https://support.plesk.com/hc/en-us/...figure-domain-to-use-only-mail-functionality-) and also this (https://support.plesk.com/hc/en-us/articles/115000214973).

I also entered the MX record "mail.mydomain.com" in the DNS panel of mydomain.com, but the mail doesn't work.

If I try to log in with the webmail it tells me unable to log in.

Any help?

Thank you in advance!

 

[mow]

Just to make sure, you do have also set an A record for mail.mydomain.com?

 

[nornagest]

Of course, in my DNS panel I have the following:
A record *.mydomain.com. -> IP of webserver (with files of website)
A record mail.mydomaind.com -> IP of mail server
A record webmail.mydomain.com -> IP of mail server (with Roundcube)
MX record mail.mydomain.com

 

[mow]

Wait, so roundcube itself already loads on webmail?
And you can login with external mail clients?

 

[nornagest]

Solved! The problem was an imcomplete DNS propagation.
Below the recap of correct way to usa a domain for mail only

In the domain's DNS control panel insert the following record:
A record mail.mydomaind.com -> IP of mail server
A record webmail.mydomain.com -> IP of mail server (with Roundcube)
MX record mail.mydomain.com

In Plesk server follow this tutorial to disable hosting functionality and DNS management https://support.plesk.com/hc/en-us/...figure-domain-to-use-only-mail-functionality-