On October 5, 2014 8:47:17 PM "A. Schulze" <s...@andreasschulze.de> wrote:
To be complete: there is an easy way to invalidate DKIM-Signatures: don't announce SMTP extension 8BITMIME ...
Bingo, make postfix disable this before msg is sent to opendkim signer, so it not signed 8bitmime, then downstream mailserver would hopefully not try to use 8bitmime convertion and invalidate dkim
Just dont know if this is possible with milter, but with postfix + amavisd dkim signer its like a charm
