Graylog can not connect to Zimbra server to send notifications

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”!

What`s is wrong? Is this a graylog bug?

My server.conf email transport options:

Email transport

transport_email_enabled = true
transport_email_hostname = my.zimbra.server"
transport_email_port = 587
transport_email_use_auth = true
transport_email_auth_username = “notify-graylog@my.zimbra.server”"
transport_email_auth_password = “my.zimbra.password”
transport_email_subject_prefix = [Graylog]
transport_email_from_email = “notify-graylog@my.zimbra.server”
transport_email_use_tls = true

Hello, Kavox,

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.

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