If you'd like to send e-mails using an email address with your domain, you have to make sure that the company will provide you with usage of their SMTP server. The aforementioned is the software system allowing e-mails to be sent. SMTP is an acronym for Simple Mail Transfer Protocol and it addresses all outgoing email messages from programs, webmail and contact forms. Whenever a message is sent out, the SMTP server checks with all of the DNS servers around the world where the emails for the receiving domain are handled and when it acquires this information, it creates a connection into the remote POP/IMAP server to find out if the recipient mailbox exists. In case it does, the SMTP server directs the e-mail body and so the receiving server sends it to the mailbox in which the recipient can open it and see it. Without having a SMTP server on your server, you will not be capable to send e-mails in any way.