Will Asynchronous email will be sent even after Web Page is closed in ASP.Net?

Hi,

I'd like a suggestion, I read this good Article:

http://www.aspsnippets.com/Articles/How-to-send-email-Asynchronously-in-ASPNet-using-Background-Thread.aspx

My Req. is after some event (ie click button) start send email process, but I'd like that user can close also the webpage without waiting the response of sending email.

How can I do this, working with webservice or ?

Tks 

Br\Vincenzo