I send out a newsletter to over 100,000 people once a month. This month
has been an utter disaster.
For some reason, when ASSP generates the DKIM signature for this month's
newsletter, it generates it incorrectly. As a result, the newsletter has
been rejected by all major email systems (most notably Google and
Microsoft) - and as a result of the mass rejections, my server is now
blacklisted all over the place.
This is what Google is saying:
DKIM: 'FAIL'
Authentication-Results: mx.google.com; dkim=neutral (body hash did not
verify)
I can send other emails to Google through my server and they are signed
properly and pass. But when I send this specific email, containing this
month's newsletter, the DKIM signature created by ASSP is consistently,
repeatedly wrong, and is rejected everywhere.
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