If you wish to send e-mail messages using an e-mail address with your domain name, you have to make sure that the provider will give you usage of their SMTP server. The aforementioned is the software system which enables e-mails to be dispatched. SMTP is an acronym for Simple Mail Transfer Protocol and it handles all outbound e-mails from applications, webmail and contact web forms. Whenever a message is sent out, the SMTP server checks with all of the DNS servers around the world where the e-mails for the receiving domain name are taken care of and as soon as it acquires this info, it connects to the remote POP/IMAP server to see if the recipient mailbox exists. If it does, the SMTP server directs the message body while the receiving server sends it to the mail box in which the recipient can open it and see it. Without having a SMTP server on your server, you will not be capable to send out emails in any way.