Oh - I forgot the other advantage of doing this. When you aggregate all .forward email out through a single box, stuff that's slipping through your filters starts to stick out like a sore thumb when you analyze the mail queues on that box, so you can tune your inbound filters better. Quite a useful thing to do, really. srs On 11/20/05, Suresh Ramasubramanian <ops.lists@gmail.com> wrote:
Turns out the reason was a lot of users with .forwards to AOL accounts, then reporting .forwarded email as spam. This email was also going out through our standard outbound mail relays, and the combination of our outbound spam levels (pretty low for an ISP our size) AND .forwarded email tipped the balance.
So what we did was to set things up so that .forward traffic was routed out a separate IP. And we told AOL what that IP was and also told them that the only thing coming out of it would be .forward traffic.