I had this weird issue. On CentOS 7 I set up mail server with Postfix, Dovecot, ClamAV, rspamd and OpenDKIM. Everything was working fine except all of my outgoing emails weren’t signed by DKIM.
In mail log this message was shown:
... Mar 2 14:02:16 vps opendkim[10810]: 6FD942E30BB: not authenticated Mar 2 14:02:16 vps opendkim[10810]: 6FD942E30BB: no signature data ...
After a lot of trying different configs an options, I googled answer on this forum. Apparently, opendkim thought that user wasn’t authenticated, but in reality, it was. This was due to Postfix configuration. There was missing milter macro. I added {auth_type} macro to milter_mail_macros. Then restarted Opendkim and Postfix and it started to work properly.
Now my postfix configuration (main.cf) for milters looks like this:
milter_protocol = 6
milter_default_action = accept
milter_connect_macros = j {daemon_name} v {if_name} _
milter_mail_macros="i {mail_addr} {client_addr} {client_name} {auth_type} {auth_authen}"
smtpd_milters = inet:localhost:11332 inet:localhost:8891 unix:/var/spool/postfix/clamav/clamav-milter.socket
non_smtpd_milters = $smtpd_milters
And emails are getting signed correctly:
... Mar 2 14:15:56 vps opendkim[11513]: 8C5213E36D: DKIM-Signature field added (s=mail, d=domain.com) ...
Thx taht help me, now openkim add the signature.
But for now this signature is not valid.
Almost now I ve a signature ^.^ I just need to find why it’s not valid!
Anyway thx for this post that help me!
thank you so much i was looking all over to why it wouldnt sign the mails
this fixed it