If you would like to send out e-mails through an email address with your very own domain name, you have to make sure that the company will provide you with usage of their SMTP server. The aforementioned is the software that enables emails to be sent out. SMTP is an abbreviation for Simple Mail Transfer Protocol and it deals with all outbound e-mails from programs, webmail and contact web forms. When a message is sent out, the SMTP server checks with all the DNS servers throughout the world where the e-mails for the receiving domain name are handled and once it acquires this information, it connects into the remote POP/IMAP server to check if the recipient mailbox exists. In case it does, the SMTP server transmits the e-mail body and so the receiving server delivers it to the mail box where the recipient can open it up and read it. Without an SMTP server on your server, you will not be capable to mail out messages in any way.