This was fixed in Mailman 2.1.10 by adding the following to Defaults.py along with the code to implement it. # Some list posts and mail to the -owner address may contain DomainKey or # DomainKeys Identified Mail (DKIM) signature headers <http://www.dkim.org/>. # Various list transformations to the message such as adding a list header or # footer or scrubbing attachments or even reply-to munging can break these # signatures. It is generally felt that these signatures have value, even if # broken and even if the outgoing message is resigned. However, some sites # may wish to remove these headers by setting this to Yes. REMOVE_DKIM_HEADERS = No ** Changed in: mailman Status: New => Fix Released ** Changed in: mailman Milestone: None => 2.1-stable -- Mailman must not strip DKIM-Signature headers https://bugs.launchpad.net/bugs/557493 You received this bug notification because you are a member of Mailman Coders, which is subscribed to GNU Mailman.