Option or rule in which we can add a group so that, if some external user sends any mail to the group members ID Directly (not to the group ID) that can be blocked.

In this case, I want deny recipient for external mails.
But for some external domain mail, I want able this single recipient to receive these external mail (only these external mails)

Do you want to deny the sender or the recipient?

I would like deliver external mail (3 external senders for 1 week only) a member users, that are in an internal mail group, that is populated in "Deny messages intended for the following internet addresses" (Document configuration server).
There's populated a mail group, because when we managed it with internet address of my users, an evening this document was corrupted.
We manage this mail group, every weeks, so we prefer add/remove users in a mail group and not in Document Configuration.

So we ask you, if it's possible create an "exception", whitelist, ...., to deliver only few external mails (in our case there are 3 good senders) to our member user with deny inbound external message.

Sender send mail to singolar user, and not at mail group.

Thanks

Daniele Baroni