hector wrote: > Michael Thomas wrote: > > > Is this really worth worrying about? I mean, the amount of > > actual ham is in the vast minority so even if all of your ham > > was doing tons of anti social things it probably wouldn't make > > much if any difference in your average border mail gateway's job. > > Possibly mike. I certainly do not wish to do more work than necessary. > > But I have to consider customer sites patterns with heavy facebook users > seeing tons of fb notifications and see if a simple check can add to the > optimization. > > Before that though, I need to see if this can be confirm by others. > Checking yesterday's logs and collection of dkim messages, I see > intermittent FB dupe signature messages and I just found one with 4 > duplicate signatures: > > DKIM-Signature: v=1; a=rsa-sha1; d=facebookmail.com; s=q1-2009b; > c=relaxed/relaxed; > q=dns/txt; i...@facebookmail.com; t=1256955289; > h=From:Subject:Date:To:MIME-Version:Content-Type; > bh=Qfz3NWckqB6n8R6eXuamGE/bU/k=; > b=gwjR3fg8RpRr6X2TvywoXBSiP2niRsyCoKBsnW0yaNxkJk4t > 87dWx8H/rXEN54O6jHf+Uf9mG4Tth7ZcoNY+GA==; > > times 4. > > So although its the only header exhibiting dupes and I don't see this > behavior with other DKIM signers, I am still going to give FB the > benefit of the doubt and check if this FB signature is somehow raising a > hidden reception bug in our code. Off hand I doubt it since our code is > using DATA 8k buffer read/write to a temp file. i.e, its not reading per > line in the DATA block but FB might be sending it per line. I have to > see whats going on there.
This is a FB bug. I found a few dupe signatures in my gmail.com DKIM inbox messages. Authentication-Results: mx.google.com; spf=pass (google.com: domain of notification+oa_f=...@facebookmail.com designates 69.63.178.168 as permitted sender) smtp.mail=notification+oa_f=...@facebookmail.com; dkim=pass header...@facebookmail.com DKIM-Signature: v=1; a=rsa-sha1; d=facebookmail.com; s=q1-2009b; c=relaxed/relaxed; q=dns/txt; i...@facebookmail.com; t=1256850354; h=From:Subject:Date:To:MIME-Version:Content-Type; bh=S42HtkCAiDk1v1BDNOHxQgeRrYo=; b=A4qKEDv0BKvB+wF/SXQAHvb97bJs2o9Q0CMgAHlou5JP ypm65flyo1kmoNq1qNmwpOktuhbxBFnsbBN+VsQsRA==; DKIM-Signature: v=1; a=rsa-sha1; d=facebookmail.com; s=q1-2009b; c=relaxed/relaxed; q=dns/txt; i...@facebookmail.com; t=1256850354; h=From:Subject:Date:To:MIME-Version:Content-Type; bh=S42HtkCAiDk1v1BDNOHxQgeRrYo=; b=A4qKEDv0BKvB+wF/SXQAHvb97bJs2o9Q0CMgAHlou5JP ypm65flyo1kmoNq1qNmwpOktuhbxBFnsbBN+VsQsRA==; -- HLS _______________________________________________ NOTE WELL: This list operates according to http://mipassoc.org/dkim/ietf-list-rules.html