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=(_at_)facebookmail(_dot_)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=to9(_at_)facebookmail(_dot_)com designates 69.63.178.168
as
permitted sender)
smtp(_dot_)mail=notification+oa_f=to9(_at_)facebookmail(_dot_)com;
dkim=pass header(_dot_)i=(_at_)facebookmail(_dot_)com
DKIM-Signature: v=1; a=rsa-sha1; d=facebookmail.com; s=q1-2009b;
c=relaxed/relaxed;
q=dns/txt; i=(_at_)facebookmail(_dot_)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=(_at_)facebookmail(_dot_)com; t=1256850354;
h=From:Subject:Date:To:MIME-Version:Content-Type;
bh=S42HtkCAiDk1v1BDNOHxQgeRrYo=;
b=A4qKEDv0BKvB+wF/SXQAHvb97bJs2o9Q0CMgAHlou5JP
ypm65flyo1kmoNq1qNmwpOktuhbxBFnsbBN+VsQsRA==;
--
HLS
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