[Rspamd-Users] rspamd DKIM, Mimecast and Content-Encoding

[Gerald Galster]

>> in your dkim signer please disable 8bitmime before dkim signing
> 
> How would I do this in rspamd?


https://www.postfix.org/BDAT_README.html

You could try to override the following in master.cf for submission smtpd (465/587):
  ...
  -o smtpd_discard_ehlo_keywords=chunking,8bitmime

Other than testing, I would not advise to disable 8bitmime.

You could also start smtpd with smtpd -v in master.cf to get lots of debug output
in your maillog. That way you can see the mimecast smtp conversation in detail
and check if 8bitmime is offered.

Best regards,
Gerald