First of all let me clear that it is not Microsoft Outlook Product Error, This error is about miss configurations of Microsoft Outlook POP3 and SMTP email Address. This error comes with Microsoft Office Outlook 2003, 2007 & 2010 as well and on all Microsoft Operating Systems. If you test your account while POP3 / SMTP email account settings in outlook, you may get this error stating “ Send test e-mail message: An unknown error occurred, error code: 0x80040607 ”. As I noticed that this error indicates wrong SMTP settings in Microsoft outlook. If you don’t test your account while setting up outlook email account then your error may be different. In my experience when you send an email from your outlook, your email account may be sent but hopefully you will get an e-mail with delivery failure notification “Undeliverable”. There must be something like this “ The following recipient(s) cannot be reached: 'rizwan@solexpert.blogspot.com' on 12/14/2011 12:4...