How does vBulletin send email?
 

Hi,

I've been using vBulletin for quite some time now. I wish to know the following -

I recently sent email to about 12000 members asking them to activate their account. I sent email through the admin panel mail send functionality.

The mail was sent quite rapidly (about 300 mails in one go). Is this dangerous? I bet it is not. However I am curious to know how does vbulletin send email (without using SMTP!). Is the technique used by vbulletin the best way to send email?

Any technical insights are welcome :)