I have been working this issue for a week and I have yet to figure out what is a miss. Our test units with Outlook Express, Mac Mail work fine no issues with authentication and mail inside the network, but when I use it outside through my WM5 phone with IMAP and SMTP configuration I get SASL errors.
I also get this with Mac client when coming in from the public internet.
What is missing please help...
I have check Zimbra Forums, Postfix, and SASL background.