In order for you to send out emails using an email address with your domain name, you have to make sure that the provider will give you access to their SMTP server. The aforementioned is the software which permits e-mail messages to be dispatched. SMTP is an acronym 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 confirms with the DNS servers globally where the e-mails for the receiving domain are taken care of and when it gets this info, it will connect to the remote POP/IMAP server to check if the recipient mail box is out there. If it does, the SMTP server sends the email body and then the receiving server sends it to the mailbox where the recipient can open it and read it. With no SMTP server on your server, you won't be capable to mail out emails in any way.