Justin Mason wrote:
Ah, I see.
Nope, I can't think of any way to (a) allow users to send via their own
choice of outgoing relay, (b) without any prior knowledge at the sending
end, (c) without sending-side code changes *and* (d) catch backscatter
without catching "real" bounces. This ruleset does require knowledge
of what outgoing relays are used.
Using SPF or DKIM won't work, because the bounces won't contain enough
information for them.
Sure they do! Well, sorry, real bounces with DSN information will.
Frankly, I have a local rule to dump any postfix bullshit replies. I've
been tempted to report them to SpamCop (who will accept those
complaints, I know, we get them on our colo customers all the time)
--
Jo Rhett
Network/Software Engineer
Net Consonance
