If you get the The server responded: 421 Cannot connect to SMTP server error when trying to send emails in Outlook, use these fixes.

My outlook 2010 clients will not connect to their respective mailbox servers when the outlook connection is manually set to connect to mail.domain.org - which is the 2013 CAS server.

I get this message every five minutes to the second. It logs two events when it happens: both have event ID 26 from source Outlook. The first one says "Connection to the Microsoft Exchange Server ...

Microsoft is investigating an issue that prevents Outlook and other email clients from connecting when using an Outlook.com account.

If you're using the just-released preview of Outlook 2013, you might have run into a bug that prevents you from properly setting up a Hotmail account. Here's a workaround, and some bad news for ...

Is Microsoft Outlook down right now? Are Hotmail email servers down today? What does Down Detector say? What we know.