If the message is totally empty or consists only of CRLF sequences, or not even that, then the "l=" value should be zero since they would all be ignored and not fed to the hash; the total number of bytes fed to the hash would be zero. I suggest reaching out to Gmail to find out what's going on.
-MSK On Sat, Aug 3, 2013 at 5:53 AM, henry+d...@unlocktheinbox.com < henry+d...@unlocktheinbox.com> wrote: > I received and email with a l=2 tag in the DKIM Signature and after body > canonicalization put the length at zero, since the body was blank. I notice > that some email processors fail this condition (smartermail) and other > passes this condition (gmail, port25). > > According to the spec "This value MUST NOT be larger than the actual > number of octets in the canonicalized message body." > > To me that implies that it should PermFail, when this condition takes > place. So why does gmail consider this valid? What are your thoughts? > > Henry Timmes > www.UnlockTheInbox.com > > _______________________________________________ > NOTE WELL: This list operates according to > http://mipassoc.org/dkim/ietf-list-rules.html > >
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