Messages to Python-List aren't posting

Matthew Lefavor mclefavor at gmail.com
Fri Jul 19 16:27:29 CEST 2013


(Sorry to reply-all, but in this case I think the direct messages will get
to people on this thread 12 hours earlier than the others.)

Well, I have had this problem with both my work email (matthew dot lefavor
_at_ nasa dpt gov) and my Gmail account. Since this doesn't happen to all
users (nor all Gmail users, for that matter), the only thing that's
constant here is that it's my name (well, and my password, but one would
hope that passwords aren't relevant here). Is it possible that the name
"Matthew Lefavor" has been added to a greylist or something?

One relevant piece of information: I have subscribed and unsubscribed to
different combinations of these lists several times over the past year, and
particularly over the past few months (as I was trying to manage the flow
of emails to my filter-less work inbox.) Could that sort of behavior
associate my name with malicious intent?

Matthew Lefavor


On Fri, Jul 19, 2013 at 9:29 AM, Skip Montanaro <skip at pobox.com> wrote:

> > Date: Thu, 18 Jul 2013 16:30:51 -0400 - timestamp of your mail
> > Thu, 18 Jul 2013 13:30:51 -0700 (PDT) - you posted it via HTTP
> > Thu, 18 Jul 2013 22:31:39 +0200 (CEST) - it reached python.org
> > Fri, 19 Jul 2013 09:56:14 +0200 (CEST) - it began delivery to my address
> > Fri, 19 Jul 2013 00:56:15 -0700 (PDT) - it reached gmail and me.
> >
> > So the big delay is somewhere within python.org. Since this does NOT
> > happen to everyone, I would be looking for something like:
> > * Moderation requirements (does your message not comply with spec?)
> > * Spam greylisting
> > * Slow/glitchy DNS when attempting to verify your message
> >
> > Most likely I think is moderation, given the extreme length of time.
> > Something would have to be pretty glitchy to lag your mail out for
> > half a day in spam filtering. It's possible, I guess, though. I've no
> > idea what anti-spam features the list is using.
>
> Python.org runs Mailman 2.1.something.  In addition to all the various
> front-end filters running in the Postfix SMTP daemon (which trap most
> spam), SpamBayes is used as a last check to score messages intended
> for delivery to most mailing lists hosted on mail.python.org. It
> leaves two headers behind as proof of its existence.  Here are those
> headers for Matthew's message that started this thread:
>
> X-Spam-Status: OK 0.017
> X-Spam-Evidence: '*H*': 0.97; '*S*': 0.00; 'subject:Python': 0.06;
>         'problem?': 0.07; 'subject:posting': 0.09; 'python': 0.11;
>         'posted': 0.15; 'effect.': 0.16; 'missing?': 0.16; 'python-dev,':
>         0.16; 'server,': 0.19; 'all:': 0.24; "i've": 0.25; 'message-
>         id:@mail.gmail.com': 0.30; 'obscure': 0.31; 'lists': 0.32;
>         'trouble': 0.34; 'anybody': 0.35; 'but': 0.35;
>         'received:google.com': 0.35; 'there': 0.35; 'subject:List': 0.36;
>         'list.': 0.37; 'gmail': 0.38; 'to:addr:python-list': 0.38;
>         'issue': 0.38; 'moving': 0.39; 'to:addr:python.org': 0.39;
>         'mailing': 0.39; 'first': 0.61; 'hours': 0.66
>
> so SpamBayes thought it looked fine.  Had it been marked as "UNSURE"
> or "SPAM" in the status header, Mailman would have held it for
> moderator attention.  It is possible it was held by Mailman for some
> other reason.  Some obvious reasons: sender isn't subscribed, message
> had too many recipients, python-list at python.org was BCC'd (implicit
> destination). If you message was held by Mailman, moderator overload
> is the most likely cause of the delay.  It's also possible Mailman got
> overwhelmed, but I've seen no postmaster messages suggesting there
> were any systemic problems.
>
> BTW, although SpamBayes serves as a last resort for mail arriving via
> SMTP, it is the only line of defense for mail gatewayed from Usenet.
> I'm sure I can dredge up the code I wrote for that if anyone wants it
> for another application.
>
> Skip
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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