[Mailman-Users] Interesting problem with gmail users

2010-12-07 Thread Paul Tomblin
Note: this is NOT the frequently asked question about why GMail users
don't see their own posts.

I run a bunch of mailman mailing lists, and I'm subscribed to those
lists from my GMail account.  I also set up a filter to tag the posts
from those mailing lists.  However, the messages from some other GMail
users on those mailing lists show a banner that says Due to a filter
you created, this message was not sent to Spam. Edit Filters.  Other
GMail users do not show that banner.  The ones who do show the banner
show it consistently for every message they send to the list (although
not on messages they send me directly) and the ones who do not show
the banner never show it.  I've never seen it for a non-GMail address.

I suspect it has something to do with the way GMail puts a
DKIM-Signature and DomainKey-Signature on outgoing mail.  Something
Mailman is doing is making the signatures invalid.  As a matter of
fact, doing a Show original on a couple of the flagged messages
seems to confirm that, with messages like

Authentication-Results: mx.google.com; spf=pass (google.com: domain of
geeks-boun...@list.xcski.com designates 69.164.214.240 as permitted
sender) smtp.mail=geeks-boun...@list.xcski.com; dkim=neutral (body
hash did not verify) header...@gmail.com

So what are my options here?  Can I strip out the DKIM headers within
Mailman?  Or should I just configure my mailserver to add a DKIM
header?


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Re: [Mailman-Users] Interesting problem with gmail users

2010-12-07 Thread Mark Sapiro
Paul Tomblin wrote:

I suspect it has something to do with the way GMail puts a
DKIM-Signature and DomainKey-Signature on outgoing mail.  Something
Mailman is doing is making the signatures invalid.


If your list adds msg_header or msg_footer, that almost certainly
breaks the signatures. If your list makes no alterations to the
message body or subject or reply-to headers, it shouldn't break the
signatures, but certain Python email library transformations over
which Mailman has no control may break them anyway.


As a matter of
fact, doing a Show original on a couple of the flagged messages
seems to confirm that, with messages like

Authentication-Results: mx.google.com; spf=pass (google.com: domain of
geeks-boun...@list.xcski.com designates 69.164.214.240 as permitted
sender) smtp.mail=geeks-boun...@list.xcski.com; dkim=neutral (body
hash did not verify) header...@gmail.com

So what are my options here?  Can I strip out the DKIM headers within
Mailman?  Or should I just configure my mailserver to add a DKIM
header?


Beginning in Mailman 2.1.7, these signatures were removed. Beginning in
Mailman 2.1.10, this removal was made conditional on the new mm_cfg.py
setting REMOVE_DKIM_HEADERS which defaults to No.

So, assuming your Mailman is 2.1.10 or later, you can configure it to
remove the headers by putting

REMOVE_DKIM_HEADERS = Yes

in mm_cfg.py.

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Re: [Mailman-Users] Interesting problem with gmail users

2010-12-07 Thread Paul Tomblin
On Tue, Dec 7, 2010 at 1:13 PM, Mark Sapiro m...@msapiro.net wrote:
 REMOVE_DKIM_HEADERS = Yes

Well, that worked in the sense that their messages no longer have the
DKIM headers and the Authentication-Results header doesn't mention any
problems:

Authentication-Results: mx.google.com; spf=pass (google.com: domain of
geeks-boun...@list.xcski.com designates 69.164.214.240 as permitted
sender) smtp.mail=geeks-boun...@list.xcski.com

However, those two users are still showing that banner Due to a
filter you created, this message was not sent to Spam. Edit Filters.
I guess it's just a Google thing now, not a Mailman problem.  But if
anybody on the list has any insight into that banner and how to get
rid of it, I'd like to hear it.

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Re: [Mailman-Users] Interesting problem with gmail users

2010-12-07 Thread Brad Knowles
On Dec 7, 2010, at 1:40 PM, Paul Tomblin wrote:

 However, those two users are still showing that banner Due to a
 filter you created, this message was not sent to Spam. Edit Filters.
 I guess it's just a Google thing now, not a Mailman problem.  But if
 anybody on the list has any insight into that banner and how to get
 rid of it, I'd like to hear it.

Google knows better than you do what kinds of headers they're supposed to see 
on messages that claims to be coming from senders on Gmail.  If you don't have 
those headers on your e-mail (maybe your mailing list management software 
removed them), then that would be likely to cause problems.

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