Dear, I've a Postfix server where I've implemented DKIM for incoming mails.
While receiving mails, I'm seeing the /var/log/zimbra.log file and I can see a type of error as in below case corresponds to a mail sent from Gmail to my Zimbra account: dkim: FAILED Author+Sender+MailFrom signature by d=gmail.com, From: < aco1...@gmail.com>, a=rsa-sha256, c=relaxed/relaxed, s=20161025, i=@ gmail.com, invalid (public key: DNS error: no nameservers) I confirm that in my Postfix server I have DNS resolution. What can be the problem ? How can I put DKIM to work for incoming messages ? Special thanks. Robert.
