Question how to set up mailboxes if i have SMTP activated

[davbod]

Because if i am activating SMTP on version 18.0.48 i can not have and SMTP and Dovecot (mailboxes from plesk) because they are conflicting each other. Now i am looking to have SMTP and to set somehow external mailboxes but to keep the extension of my domain for example support@thisismydomainexample.com or info@thisismydomainexample.com


so again to have SMTP on plesk and to set somehow mailboxes to keep the domain name for example support@thisismydomainexample.com or info@thisismydomainexample.com

How? Thank you!