My Zimbra server has a valid ssl cetificate and I imported the Root CA certificate to /usr/local/share/ca-certificates/ and run /usr/sbin/update-ca-certificates command, successfully. But to try “Test Notification” I got this error: “Error: Notification has email recipients and is triggered, but sending emails failed. Sending the email to the following server failed : my.zimbra.server:587”!
It looks like so far your post hasn’t received a response. Let’s try to get more eyes on it. If you have any additional information you can provide on this issue, it may help to prompt a response. In the meanwhile, here’s a similar post in the community. It looks like you’ve included the authentication information already. Is it possible that the server requires two-step authentication? Just a thought. Your question is important to the community. Let’s work to find a solution.