Dkim double signature

This issue can happen when using amavis.
In case you have a double email signature you can edit your postfix config.

However, mostly double dkim is NOT an issue, you need to be sure that your dkim signature is added on the DNS servers (if you are using an external DNS).

File: /etc/postfix/master.cf

smtp	  inet  n	-	n	-	-	smtpd
  -o content_filter=smtp-amavis:127.0.0.1:10024
  -o receive_override_options=no_address_mappings

After no_address_mappings add no_milters , example:

smtp	  inet  n	-	n	-	-	smtpd
  -o content_filter=smtp-amavis:127.0.0.1:10024
  -o receive_override_options=no_address_mappings,no_milters

After changes restart postfix:

service postfix restart
Tagged: