Hello Ron,
Not 100% sure but, I don't think aliases are processing content filters. They are only pointers for deliveries to either:
- local mailboxes, which will then process content filters when the mail is delivered to it
- external mailboxes, and then it's up to the external recipient server to do any kind of content filtering.
I guess what you could do is remove the alias and create it again as a real mailbox.
Then, use the this mailbox forwarding options to forward the mail to the final recipients (internal or internal).
Kind regards
Sébastien Riccio
System & Network Admin
https://swisscenter.com