How does Magento deliver mail?

Question

I have noticed that there are no explicit mail settings in Magento on which SMTP server to use to send mail.

For example; I could setup my mail to indicate that it is coming from test@mydomain.com , while at the same time using Google Apps for mail. And, eventhough the SMTP server settings are not possible to setup in a default Magento install. Magento still manages to deliver the mail. How is this possible?

Answer 1

It does what Zend does.

Have a look in /lib/Zend/Mail/

Or check their documentation.

Answer 2

Magento sends emails using Zend_Mail component.
However, you can assign custom SMTP settings using free SMTP Pro extension .