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I have one specific user that cannot receive external email from anywhere. (Internal is fine)<br />
External NDR is: 550 Requested action not taken: mailbox unavailable<br />
<br />
I have checked the POP3 Connector - they are listed with the same setting that the rest of the staff are. I can't seem to figure out what other setting needs to be changed. <br />
<br />
We are using the following:<br />
Windows SBS 2003, Exchange 2003, POP3 Connector, SB SMTP Connector<br />
<br />
I am a little unfamiliar with this type of setup, but it looks like they use both the POP3 connector and the SMTP connector to receive and send email via their web host. <br />
<br />
Any ideas on where I could look?<br />
<br />
Thanks,<br />
<br />
E.D.
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I have one specific user that cannot receive external email from anywhere. (Internal is fine)
External NDR is: 550 Requested action not taken: mailbox unavailable

I have checked the POP3 Connector - they are listed with the same setting that the rest of the staff are. I can't seem to figure out what other setting needs to be changed. 

We are using the following:
Windows SBS 2003, Exchange 2003, POP3 Connector, SB SMTP Connector

I am a little unfamiliar with this type of setup, but it looks like they use both the POP3 connector and the SMTP connector to receive and send email via their web host. 

Any ideas on where I could look?

Thanks,

E.D.

Exchange 2003 / SBS Issue - One user gets error '550 Requested action not taken: mailbox unavailable'

Small Business Server (SBS) is a line of server operating systems targeted at small businesses by bundling the operating system with a number of other Microsoft products that would normally need to be purchased or licensed separately. The most notable inclusions are Exchange, SQL Server, SharePoint and ISA/TMG (Microsoft's firewall and proxy server).

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.