Does not authenticate to send mail from outlook outside the internal network

[wilson paolini]

Good afternoon everybody, I'm having trouble sending mail outside the company network from outlook. When configuring Outlook with the Zimbra server information, I can not authenticate, I can only access via webmail. The outlook states that the server has no authentication mechanisms supported and I've checked the SMTP parameters in main.cf. Once inside the company network functions normally. Does anyone have any idea what could be?

Zimbra version 6.0.6

[phoenix]

Use Port 587 in the Outlook configuration for the Submission port and that needs Authentication - you should also look in the log files for any errors when you try a send.

[wilson paolini]

hello i changed the port to 587 and did not work either, the server is configured to port 25. The outlook can receive mail but not send external network. See the log zimbra.log below:


Feb 16 16:48:46 mail postfix/smtpd[2774]: NOQUEUE: reject: RCPT from unknown[186.204.225.235]: 554 5.7.1 : Relay access denied; from= to= proto=ESMTP helo=

Feb 16 16:48:46 mail postfix/smtpd[2774]: NOQUEUE: reject: RCPT from unknown[186.204.225.235]: 450 4.7.1 Client host rejected: cannot find your hostname, [186.204.225.235]; from= to= proto=ESMTP helo=

[phoenix]

Originally Posted by wilson paolini

Feb 16 16:48:46 mail postfix/smtpd[2774]: NOQUEUE: reject: RCPT from unknown[186.204.225.235]: 554 5.7.1 : Relay access denied; from= to= proto=ESMTP helo=

Feb 16 16:48:46 mail postfix/smtpd[2774]: NOQUEUE: reject: RCPT from unknown[186.204.225.235]: 450 4.7.1 Client host rejected: cannot find your hostname, [186.204.225.235]; from= to= proto=ESMTP helo=

That's because you have a protocol check set in the Admin UI and you are cause the rejection.

[wilson paolini]

Where can I disable this protocol in the web interface, you can help me?