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Thread ID: 124157 2012-04-10 05:57:00 Exchange/SBS2003 : valid email bounceback as unknown 1101 (13337) Press F1
Post ID Timestamp Content User
1269071 2012-04-10 05:57:00 Hi Guys
Has anyone seen this with Exchange / SBS2003

When I sent to a valid email address, I got the bounce back below. This happened once , yet Ive sent 6 other emails to that address within the hour (before & after) without issue & received at the other end.
Nothing relevant in the server logs at either end . Exchange Message Tracking Center didnt show the bounced email, but all the other successful emails showed of course.
Any ideas what could have caused this?
Cheers

The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.
<mail.####.co.nz #5.1.1 smtp;550 5.1.1 <#####@######.co.nz>: Recipient address rejected: User unknown in local recipient table>
1101 (13337)
1269072 2012-04-10 10:32:00 That is the standard message you get if you send to an email address that doesn't exist in Exchange.
As to what caused it to happen for just that occasion will be hard to track down.
No one was busy working on the receiving Exchange server?
Updating mailboxes or something?
What's the performance of the receiving Exchange server like?
Did it only happen to this one email address?
CYaBro (73)
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