I thought that I have configured zimbra to authenticate with TLS for smtp;
zmprov gs mail.X.Y.com | grep Auth
zmprov gs mail.X.Y.com | grep Mode
In Outlook I have set SMTP SSL port to 465 as suggested in zimbra wiki.
BUT HERE IS THE STRANGE PROBLEM:
I can send emails through zimbra if I set my outlook client to authenticate WITHOUT SSL
But I am constantly being asked for the username and the password if I set Outlook to authenticate WITH TLS.
How can I send emails through zimbra even tough it is set to authenticate only with TLS ? And how to set up to authenticate with TLS ?