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Question Add DKIM signature to relayed emails

imrelaszlo84

New Pleskian
Server operating system version
Ubuntu 22.04.3
Plesk version and microupdate number
18.0.56 #4
Hello!

I've a Plesk server, name it: mail.domain.tld for example. I've another simple server without Plesk, name it external.domain.tld for example. The external.domain.tld server has a basic Postfix installation, and mail.domain.tld is a relay for it, without authentication (IP address added under Mail Server / White List). The relay works properly, but I'd like to add an DKIM signature to the outgoing e-mail. Is it possible with Plesk, without adding the mail.domain.tld as a full-featured domain? Can I generate a DKIM keypair witk Plesk CLI for example, and instruct Plesk / Postfix to sign the outgoing e-mail for emailaddresses@external.domain.tld format senders?
 
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