From an article by Mohammed Moinudheen on MSSQL tips
SMTP Server Details
Hotmail SMTP server name: smtp.live.com Port number: 587
Gmail SMTP server name: smtp.gmail.com Port number: 587
Yahoo SMTP server name: smtp.mail.yahoo.com Port number : 25
AOL SMTP server name: smtp.aol.com Port number : 587
SMTP
smtp