Outgoing email messages not DKIM signed when enabled for a domain and in server settings

[enerspace]

Why isn't a SMTP solution simply introduced that fundamentally sends all notifications via this connection?

For example:

• Plesk Panel notifications
• Watchdog notifications
• Grafana notifications

 

[Tofandel]

I had the same issue, even though the UI says "sendmail emails will be signed", postfix is not configured to do so properly, it only has smtpd_milters configured for dkim signing.

To enable dkim signing for sendmail I had to run

postconf -e "non_smtpd_milters = inet:127.0.0.1:12768"
systemctl restart postfix