[Greylist-users] GroupWise is the Devil
marius at marius.org
Thu Jul 3 16:10:18 PDT 2003
> Thanks, I'll do that. I'll keep you guys anonymous, in case that is
> why you aren't posting to the list directly.
I've gone ahead and subscribed, so I'll start taking some of this to the
list in the future.. See below for more testing:
> > A tcpdump shows that GroupWise does say QUIT after it sees the 451 error.
> > However, the bounce message the user gets indicates:
> > The attached file had the following undeliverable recipient(s):
> > destination at host.com
> > Transcript of session follows:
> > Command: DATA
> > Response: 551 No valid recipients
> > So, in effect, GW seems to be lying outright about what it's doing.
> That is really weird. I'm glad you were able to verify this, since I don't
> have direct access to a network with a groupwise server. But I did get a
> one of those bounces forwarded to me from a user on a groupwise server, and
> it looks exactly the same as yours.
> I filed a bugreport at support.novell.com. Let's see how quick they are to
> respond. Too bad my email address will bounce them if they use Groupwise.
> Can you change the response code in your milter to return 450 or 452 instead
> of 451, and see if that results in any different behavior? I can't believe
> they have this big of a gaping bug for all 4xx codes. I'll probably wait on
> sending this info to the users list until behavior with the other error
> codes is confirmed.
Tried with 450, 452, and 421, all exhibit the same behavior as 451.
> > You can see tcpdumps, bounce messages, and more here:
> > http://www.nostrum.com/~pckizer/greylist/
> > (cis-gw.tamu.edu is a groupwise box, all other boxes are sendmail
> > running greylisting)
> > > Make sure that this isn't the problem that I described in the greylisting
> > > docs under "Implementation Caveats". I'm guessing that groupwise is the
> > > cause of this, though I don't know for sure.
I also tried tweaking the Milter failure to occur after the DATA section
instead of after RCPT. GW does properly queue and resend the message
at this point. Grrrr.
Marius Strom | Always carry a short length of fibre-optic cable.
Professional Geek | If you get lost, then you can drop it on the
System/Network Admin | ground, wait 10 minutes, and ask the backhoe
http://www.marius.org/ | operator how to get back to civilization.
\-------------| Alan Frame |---------------------->
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