Is it possible to deny SMTP for a specific virtual site

Hi all

Does anybody know if it’s possible to deny SMTP access for specific sites on the virtualmin instance?
Let’s say I have 5 virtual sites on the server

domaina.tld
domainb.tld
domainc.tld
domaind.tld
domaine.tld

Only domain A and B should be allowed to use the SMTP localhost option, but the rest shouldn’t.
Is that even possible?

Thanks in advance.

  • Tim