KNIM key in DNS zone not works


I Try to add a KNIM key in the DNS zone, but problem with Gmail account continue.

Gmail error: xxxxxxx@gmail com: SMTP error from remote server for TEXT command, host: com ( reason: 550-5.7.26 This mail is unauthenticated, which poses a security risk to th e 550-5.7.26 sender and Gmail users, and has been blocked. The sender must 550-5.7.26 authenticate with at least one of SPF or DKIM. For this message.

Please your help needed. Thanks.

Alone adding DKIM keys to your DNS won’t do anything.

You need to have the sending mail server sign your messages, with a key that matches one of the one(s) you have put in your DNS.

The part about making the mail server sign your messages, is something only the operator of the sending mail server would be able to help you with.