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Can you explain it? I try it on same computer (i.e. OS) and same account: Outlook 2003 is OK, 2010 not. 
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Can you explain it? I try it on same computer (i.e. OS) and same account: Outlook 2003 is OK, 2010 not.

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I use POP3/SMTP connections to SBS 2008 of some Outlook clients. Instruction how to do it (on port 587 with SPA) i found in ANSWERS. It run wery good on Outlook 2003 and 2007, but not on Outlook 2010. Have anybody some suggestion how to resolve it?
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I use POP3/SMTP connections to SBS 2008 of some Outlook clients. Instruction how to do it (on port 587 with SPA) i found in ANSWERS. It run wery good on Outlook 2003 and 2007, but not on Outlook 2010. Have anybody some suggestion how to resolve it?

Outlook 2010 fails login to SMTP services on SBS 2008

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.

Outlook

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.