POP3 users sending email to external domains

Q: I have Windows Server 2003 with Exchange Server 2003 and our domain is performing well but now we have to deploy some POP3 accounts.

We created a regular user in our Active Directory and just enabled the POP3 service in Exchange 2003. While the POP3 user can send and receive email in their internal account and can receive external mail, they are having issues sending email to external domains. Do you have any suggestions?

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A: It sounds like your Outlook client configuration settings may be incorrect. If you go into the options on the account settings for the Outlook POP3 connection, you'll see a tab called "Outgoing Server". Make sure that the "My Outgoing server (SMTP) requires authentication" is checked. The radio button for "Use same settings as my incoming mail server" should also be selected. If that doesn't work, it could be a problem on your SMTP gateway in Exchange.

This was first published in September 2009

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