--On Wednesday, August 05, 2015 5:54 PM +0200 Kurt Roeckx <k...@roeckx.be>
wrote:
On Wed, Aug 05, 2015 at 06:54:33AM -0700, Quanah Gibson-Mount wrote:
Yesterday, I was alerted by a member of the list that my emails to
openssl-dev are ending up in their SPAM folder. After examining my
emails as sent out by OpenSSL's mailman, I saw that it is mucking with
the headers, causing DKIM failures. This could be because of one of two
reasons:
a) The version of mailman used by the OpenSSL project (2.1.18) has a
known bug around DKIM that was fixed in 2.1.19
That seems to be about wrapped messages in case of moderation?
Ok, good to know, not applicable here then. ;)
b) The mailman configuration is incorrect.
You mean things like:
- We change the subject to include the list name?
I've fixed our config to no longer sign the subject header.
- We add a footer about the list?
Yes, this is definitely a problem, since it screws with the body.
Personally, I don't see the point of the openssl-dev footer. If someone's
on the list, I would hope they're smart enough to figure out how to
unsubscribe (although sadly, I see time and again on other lists where
people aren't...).
However, there are two solutions to that allow adding a footer when list
subscribers may have DKIM signed email:
a) As noted in the OpenDKIM README, in the "Mailing Lists" section, if the
list traffic is itself has DKIM signing in place, it will override the DKIM
signing done by the sender. This allows the footer modification to the
message to no longer be an issue.
b) Mailman can be configured to strip DKIM headers entirely from incoming
email. This is generally considered bad practice, but it does allow the
emails to get delivered to all list members w/o issue.
--Quanah
--
Quanah Gibson-Mount
Platform Architect
Zimbra, Inc.
--------------------
Zimbra :: the leader in open source messaging and collaboration
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