David Gibbs wrote: > mouss wrote: >> - mail admin at example.com configures his mail system to sign all >> outbound mail with DKIM >> - he rejects any mail with a From: in his domain if it doesn't have a >> valid DKIM signature >> - j...@example.com posts to a list that appends a footer (or munges the >> Reply-To header, assuming this is used in the signature). >> - list resends the message to mx.example.com. >> - mail is From: j...@example.com, but it is either not signed (list >> removed the signature) or the sig is not valid (message altered by list). > > I don't think DKIM / Domainkeys will be invalidated by adding a footer ... as > the footer is added to the message before it is signed and resent.
This may be true if the sender were adding the footer before signing and sending the message to the list. However, not true if it's the mailing list that is adding the footer after the original sender has already signed the message. Bill
