In order for you to send out e-mail messages using an e-mail address with your own domain name, you have to make sure that the provider will provide you with usage of their SMTP server. The aforementioned is the software system that permits email messages to be transmitted. SMTP is an acronym for Simple Mail Transfer Protocol and it manages all outgoing emails from applications, webmail and contact forms. Whenever a message is sent out, the SMTP server checks with all of the DNS servers worldwide where the emails for the receiving domain name are handled and when it obtains this data, it creates a connection to the remote POP/IMAP server to check if the recipient mail box exists. In case it does, the SMTP server sends the e-mail body and then the receiving server sends it to the mailbox where the recipient can open it up and read it. Without having a SMTP server on your end, you will not be capable to send messages at all.