On Thu, Dec 03, 2009 at 08:34:14AM -0800, William Jordan wrote:
> We have a user who can't send mail externally but can send mail
> locally (to people within our domain) when using Outlook 2003. But
> with Thunderbird the user can send & receive both externally &
> internally from the same machine. Naturally if they use any other
> machine they can send/receive externally using Outlook 2003. So
> it's just this one machine and it's Outlook 2003 that has the issue.
Right. It's not authenticating, as your logs show (you DID look in
logs, did you not?) It sees no SASL mechanisms it understands, so
rather than DTRT and fail with an error message, it attempts to
continue without authenticating.
> Has anyone else ever come across a similar issue?
Dozens of times, if not hundreds, on this very list. Outlook is
trash. Your search keywords are "postfix-users outlook auth
mechanism". I believe I last answered this question in August (if it
has come up since then, I might not have bothered to reply.)
This is assuming, of course, that your user is trying to AUTH at a
Postfix. If the Barracuda is the submission server, you should be
asking Barracuda for support. Or better, as I suggested in August,
refuse to support broken mail clients!
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