Package: lists.debian.org
Severity: normal

Gmail sends out all mail signed with DKIM and DomainKeys, the DKIM
signatures do not include a length field so any change to the message
length (such as appending a list footer) will break the signature.

To deal with this problem the default configuration of the Mailman
package in Lenny will strip all DKIM and DomainKeys headers
(DKIM-Signature and DomainKey-Signature are the names of the headers in
question).

I think that the ideal functionality of a list server in this regard
would be to leave DKIM headers with a length field IFF the list in
question is not configured to prepend the list name to the subject line.
If the DKIM header has no length field or the subject line is to be
modified then it needs to be stripped.  But the functionality of Mailman
in Lenny is adequate.

The current situation is that anyone who configures their mail server to
reject messages that fail the DKIM checks will reject every message sent
to a Debian mailing list from Gmail (which is a moderate amount of
mail).



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