If you wish to send e-mail messages using an email address with your own domain name, make sure that the provider will give you usage of their SMTP server. The latter is the software system which allows email messages to be sent. SMTP is an abbreviation for Simple Mail Transfer Protocol and it addresses all outgoing email messages from programs, webmail and contact web forms. Whenever a message is sent out, the SMTP server checks with the DNS servers throughout the world where the e-mails for the receiving domain are handled and when it obtains this info, it connects into the remote POP/IMAP server to find out if the recipient mail box is available. When it does, the SMTP server directs the message body and so the receiving server delivers it to the mailbox where the recipient can open it and see it. Without an SMTP server on your server, you won't be capable to mail out emails in any way.