[spambayes-dev] RE: Delivery Status Notification (Failure)

[Tony Meyer]

> Your list uses VERP bounce addresses, so the return-path includes
> the subscriber address.  After one or more forwards, the end
> user's MTA still bounces to the same address.  If the message I
> am replying to had bounced, the bounce would come back to your
> MTA with a 2821 envelope of:
> 
> MAIL FROM:<>
> RCPT TO:<spambayes-dev-bounces+sethg=goodmanassociates.com at python.org>
>
> Your list software is supposed to route that bounce to the admin so
> you can unsubscribe the dead account.  There is no way that a bounce
> should get distributed to the list, unless it really was a post, not
> a DSN.

These messages aren't going to the list, they're going to anyone that posts
to the list (i.e. ta-meyer at ihug.co.nz gets the messages when I post with
that address, not all of the spambayes at python.org recipients).  I don't know
whether mail.python.org is getting bounces or not - I presume not, or
mailman would be doing something about it.

> What do the headers look like?

This (and VERP) was the clue I needed, though (thanks!).  The (relevant)
headers of the attached (bounced) messages are (for one such message):

"""
To: "'blakemail at gmx.net'" <"blakemail at gmx.net"@smtp.hispeed.ch>,
   <spambayes at python.org>
X-MDRemoteIP: 62.250.3.117
X-MDRcpt-To: werner at wekorpershoek.nl
X-MDRedirect: 1
X-MDaemon-Deliver-To: w.korpershoek at fresq.nl
"""

So this means that the problem address is "blakemail at gmx.net", right?
That address *is* subscribed to the list.

Could someone that understands this better than me confirm this?  If so,
then unsubscribing that address is ok, right?  (I presume that attempting to
email either the fresq.nl or gmx.net address would be futile).

=Tony Meyer