JoMail can send email in a number of different manners. There are times when JoMail cannot send with a certain machanism, so it will try an alternative approach. The three sending mechanisms are SMTP, Quick Send, and web-based sending. We will discuss them briefly here.
 

SMTP

SMTP stands for Simple Mail Transport Protocol and it is the type of sending that is associated with a POP email address. If JoMail fails to send via this method, then it will try and send via the Web.
 

Quick Send

This approach to sending is used uniquely by JoMail and is designed for web-based email accounts. Quick Send is a type of SMTP sending, but just a tad bit slower. However, it is still considerably faster than sending via the web. Your web-based email is usually sent in this manner. If Quick Send fails, then JoMail will try and send your email via the Web.
 

Web-based Sending

This sending mechanism is for web-based email accounts. It is much slower than the other methods of sending and not preferred, but it is a good alternative and backup mechanism. There are times when sending the others two methods are blocked and in which the only method to send, is via the web. If the other two methods fail, then JoMail will attempt to send via the Web. It is very hard to block Web-based email from being sent.

When JoMail sends via the web, it will log into your web-based account and send as though your were sending from there. The only requirement for sending like this, is that you have a web-based email account.