If you want to send out e-mail messages using an email address with your own domain, you have to make sure that the company will provide you with usage of their SMTP server. The aforementioned is the software that enables e-mails to be dispatched. SMTP is an abbreviation for Simple Mail Transfer Protocol and it manages all outbound e-mails from applications, webmail and contact forms. Every time a message is sent out, the SMTP server confirms with all the DNS servers throughout the world where the e-mails for the receiving domain are taken care of and as soon as it gets this data, it will connect to the remote POP/IMAP server to see if the recipient mail box is available. In case it does, the SMTP server transmits the e-mail body and so the receiving server delivers it to the mailbox where the recipient can open it up and see it. With no SMTP server on your server, you will not be capable to mail out e-mails at all.