If you want to send out emails through an e-mail address with your own domain name, make sure that the provider will provide you with usage of their SMTP server. The latter is the software which permits email messages to be sent out. SMTP is an abbreviation for Simple Mail Transfer Protocol and it deals with all outbound e-mails from applications, webmail and contact web forms. Whenever a message is sent out, the SMTP server confirms with the DNS servers globally where the emails for the receiving domain name are handled and when it obtains this info, it connects into the remote POP/IMAP server to check if the recipient mail box is available. If it does, the SMTP server sends the email body and then the receiving server delivers it to the mail box in which the recipient can open it up and read it. With no SMTP server on your server, you will not be allowed to send emails in any way.