Feature Request: configure trusted sender domains per domain basis

[jaferrer71]

The idea is to be able to configure a list of trusted sender domains, for each allowed domain. It means that we could select and disable some email checks like spam, content protection policy, etc.

In real life there some times, that accepted (local) domain receives emails from a certain domain, which is legitimate and they know each other, but some emails they send get reject by som of the emails checks. So it would be great that we could disable some emails checks only for email incoming from this domain, as they are trusted. Obviously we have to make sure that this domain are not been spoofed.