- Plesk 12.x for Linux
- Plesk 12.x for Windows
DKIM does not signing messages, while it is enabled in Plesk > Tools & Settings > Mail Server Settings > DomainKeys spam protection > Allow signing outgoing mail;
The following entries can be found in
CONFIG_TEXT: postfix-local: Unable to get sender domain by sender mailname
dk_check: DK_STAT_NOSIG: No signature available in message
The following message can be received with online examiners of mail server configuration:
CONFIG_TEXT: Your DomainKeys signature is not valid
You use DomainKeys, a deprecated authentication protocol. you should switch ti DKIM.
The DomainKeys signature of your message is:
Plesk 12.x offers DomainKeys protocol, not DKIM. DKIM feature was implemented in Plesk Onyx: Please Onyx Release Notes
There are two options:
Configure DKIM manually on your side.