If you would like to send e-mail messages through an e-mail address with your own domain name, make sure that the company will give you usage of their SMTP server. The latter is the software system which enables emails to be transmitted. SMTP is an acronym for Simple Mail Transfer Protocol and it manages all outgoing email messages from programs, webmail and contact web forms. Every time a message is sent out, the SMTP server confirms with all of the DNS servers around the world where the e-mails for the receiving domain name are managed and once it gets this info, it creates a connection to the remote POP/IMAP server to check if the recipient mail box is out there. In case it does, the SMTP server sends the e-mail body and so the receiving server delivers it to the mailbox in which the recipient can open it and see it. Without an SMTP server on your end, you won't be capable to send out e-mails in any way.