[Mimedefang] Adding support for learning our addresses

[Philip Prindeville]

Except that if you're using filter_helo(), you haven't yet seen 
authentication
information at that point...  AUTH happens after HELO.

-Philip


James Ebright wrote:

> Something else unrelated to note... if your server talks to MUAs then 
> you will want to exempt any user from your helo stuff that 
> authenticates (we also exempt based on the senders IP if we are 
> certain of the IP and it is ours).