How to enable DKIM spam protection for outgoing emails of particular domain in Plesk

Question

How to enable DKIM spam protection for outgoing emails of particular domain in Plesk?

Answer

Note: if external DNS provider is used, contact your DNS owner in order to add DKIM record. Refer to this instruction for DKIM public key.

1. Enable DKIM support server-wide

2. Enable DKIM protection for particular domain:

• via Graphical User Interface (GUI):

  1. Log into Plesk

  2. Go to Domains > example.com > Mail Settings, mark Use DKIM spam protection system to sign outgoing email messages and press OK:

     

• via Command Line Interface (CLI):

  • for Linux:

    1. Connect to Plesk server via SSH.

    2. Run the command:

       # /usr/local/psa/bin/domain_pref --update example.com -sign_outgoing_mail true

  • For Windows:

    1. Connect to Plesk server via RDP.

    2. Run the command:

       C:> "%plesk_cli%domain_pref.exe" --update example.com -sign_outgoing_mail true

Additional Information

• How to enable DKIM signing for all domains on Plesk for Linux?

• How to enable DKIM signing for all domains on Plesk for Windows server?

• How to enable DKIM (DomainKeys Identified Mail) spam protection in Plesk?

• DomainKeys Spam Protection (Plesk Onyx)