[Mailman-Users] Re: Sendmail vs. envelope sender
Harald.Meland at usit.uio.no
Tue Jun 15 22:03:23 CEST 1999
> > You know, it looks like a LOT of people have this error, from looking at my
> > mailbox over the last month or so! I have some ideas about why that is.
> > Barry wrote that he couldn't reproduce it on his machine, so perhaps they
> > have turned it off in later versions... I am still on 8.8.7... Anyway, this
> > is the Sendmail that comes on the RedHat distribution... I think at least a
> > few people will have it.
> It still happens in sendmail 8.9.3 for me, and yes, you are 100% right
> about why it happens.
> > This is further explained on sendmail.org at the following URL:
> > http://www.sendmail.org/faq/section3.html#3.15
> I personally feel that it's a bug on sendmail's part; according to the
> sendmail "bat" book, only aliases that use the 'include:' directive
> have the envelope rewritten, yet it appears to happen with *any*
> alias -- be it a pipe, redirect, or whatever.
> > If the default behavior is left alone, at the very least this info should
> > make it into the documentation (under "Troubleshooting" in the "Why doesn't
> > member_posting_only work?"). If you go to the trouble of instructing
> > people how to turn off the envelope sender option, why not educate them
> > about the problem they're likely to be having first?
Yup, I'll add some text explaining this sendmail feature.
> > I have removed all my owner-* aliases (actually, having learned my lesson
> > from the listproc days, I never put them in) and envelope sender works fine.
> I'm not contesting that it works for you -- just wanted to get that
> clear first. :) However, I have had people send mail to owner-listname
> in the past because it's sort of an unofficial standard.
... but of course it is -- there's even an _sendmail feature_ to ease
implementation of it. Blech. Makes me wanna cry, really.
> Sorry. I think I'm tired... I just hate making exceptions for software that
> changes the rules...
Me too. Nevertheless, here's a patch to try specialcasing away those
broken sendmail envelope addresses (and fall back to GetSender()).
The patch (at least) assumes that your "owner-" aliases are inserted
as output by bin/newlist, i.e.
I'm not using sendmail myself, so I can't verify whether this works at
all -- please let me know whatever your findings are.
RCS file: /export/public/cvsroot/mailman/Mailman/MailList.py,v
retrieving revision 1.126
diff -u -r1.126 MailList.py
--- MailList.py 1999/06/15 07:50:54 1.126
+++ MailList.py 1999/06/15 19:52:37
@@ -1175,7 +1175,13 @@
sender = None
sender = msg.GetEnvelopeSender()
- if not sender:
+ # Specialcase an ugly sendmail feature: If there exists an
+ # "owner-foo: bar" alias and sendmail receives mail for address
+ # "foo", sendmail will change the envelope sender of the message
+ # to "bar" before delivering. This feature does not appear to
+ # be configurable. *Boggle*.
+ if (not sender or sender[:len(self._internal_name)+6] ==
+ '%s-admin' % self._internal_name):
sender = msg.GetSender()
## sys.stderr.write('envsend: %s, sender: %s\n' %
## (msg.GetEnvelopeSender(), msg.GetSender()))
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