I'm having the same problem with my Windows Live Mail. Yesterday I changed my Hotmail password as every email I sent out was being sent out multiple times (even though I only sent each email once). I changed the password as I figured spam might be involved. BUT after changing the password I can't send out more than one email at a time (cannot send out multiple emails anymore). This is the error message I receive when I try to send out multiple emails: "Your message wasn't sent because there's a daily message limit. Messages can't be sent from this account until tomorrow or until this account is verified.

Subject 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
Server Error: 3210
Windows Live Mail Error ID: 0x8DE00006

What can I do to resolve this error? Any/all advice would be greatly welcome. Thanks.

PS: I'm not familiar with how to "uncheck the Manually configure server settings". Could you assist me with further details as to how this is done? Thanks again.