Auto send email in asp.net

Based on my research this few days, I found that only sql server able to trigger and send email through the database trigger function. while mySQL unable to do that.

another method to do this is create a  .asmx web service

References:

1. http://allen-conway-dotnet.blogspot.com/search/label/.asmx
2. http://msdn.microsoft.com/en-us/library/swas0fwc(v=VS.100).aspx