Asynchronous Email

[eluser]Shouvik-S-Mazumdar[/eluser]
I am not sure if this is the correct forum to ask this question.

I want to send email asynchronously. The scenario is , when the user posts a blog , i want to send an email notifications to the users friendlist , which might contain any number of friends ( more than 100 )

I want this email service happeninng in the background , so that the user doesnt need to wait till the server sends all the email ( i might implement flow control in the future )

Is that possible ?

PS : will using ajax solve this problem ?