If you would like to send out e-mails through an e-mail address with your domain name, make sure that the provider will give you usage of their SMTP server. The latter is the software which enables e-mail messages to be dispatched. SMTP is an abbreviation for Simple Mail Transfer Protocol and it addresses 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 are taken care of and when it gets this info, it connects into the remote POP/IMAP server to find out if the recipient mailbox is out there. When it does, the SMTP server sends the e-mail body and then the receiving server sends 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 able to send emails at all.