Resolved Postfix login error with different domains

[Vincent86]

Hi, i have ubuntu 20.04 with plesk obsidian. I have install clam with amavis, postfix and spamassasin. Email works perfectly, i can send and receive email. But i have a big problem; on this server i have ten domain (domain1.com, domail2.com ecc.). If i config email on my desktop client o use webmail with roundcube, i can login with user and password of doman1 with imap and smtp of domain2. Every domains have a different IP. What's the problem?

i want that user of domain1 can't connect with smtp and imap of domain2 but only with domain1.

Thanks for support

 

[Kaspar]

Why is that a problem? It's expected behaviour. As all your domains resolve to the same mail server, no matter if they all have their own IP.

 

[Vincent86]

Why is that a problem? It's expected behaviour. As all your domains resolve to the same mail server, no matter if they all have their own IP.

thanks !