If you'd like to send out email messages using an email address with your domain name, make sure that the provider will provide you with access to their SMTP server. The latter is the software enabling email messages to be sent out. SMTP is an abbreviation for Simple Mail Transfer Protocol and it addresses all outbound email messages from applications, webmail and contact web forms. Every time a message is sent out, the SMTP server confirms with all the DNS servers around the world where the emails for the receiving domain name are handled and as soon as it obtains this information, it connects into the remote POP/IMAP server to check if the recipient mail box is out there. If it does, the SMTP server delivers the message body and the receiving server delivers it to the mailbox in which the recipient can open it up and see it. Without having a SMTP server on your end, you won't be able to send emails at all.