If you need to send e-mail messages using an e-mail address with your domain name, you have to make sure that the provider will give you access to their SMTP server. The latter is the software system that enables email messages to be sent. SMTP is an abbreviation for Simple Mail Transfer Protocol and it addresses all outbound e-mails from programs, webmail and contact web forms. Every time a message is sent, the SMTP server checks with all the DNS servers throughout the world where the emails for the receiving domain name are handled and once it gets this information, it connects into the remote POP/IMAP server to find out if the recipient mailbox is out there. When it does, the SMTP server transmits the e-mail body while the receiving server delivers it to the mailbox in which the recipient can open it up and read it. With no SMTP server on your end, you won't be capable to send out e-mails in any way.