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[SOLVED] Zimbra Server settings for allowing Outlook Connector from External networks?

Posted: Mon Sep 18, 2017 8:53 am
by Erik-NA
Users on External network, like the Internet, cannot send mail using Outlook Connector. Mail, calendar etc is synchronized from the server, but the users cannot send mail from External network. It works on internal networks.

Is there a setting anywhere to specify this?
I believe that mail is not sent via SMTP from Outlook Connector since it is a MAPI-connection like type over https?

Re: Zimbra Server settings for allowing Outlook Connector from External networks?

Posted: Mon Sep 18, 2017 9:02 am
by jorgedlcruz
Hello,
Do you have some error on mailbox.log, or zimbra.log? Also if you are using ZCO, I guess you have Zimbra Support? Maybe it will worth to open a ticket, as the Engineers there are really quick fixing issues.

Best regards

Re: Zimbra Server settings for allowing Outlook Connector from External networks?

Posted: Mon Sep 18, 2017 10:38 am
by Erik-NA
Found the problem. Zimbra server is sitting behind a https proxy with too rigorous protocol filtering. After fixing rule set, it now works.

Thanks for reply.