If you would like to send email messages through an e-mail address with your very own domain, you have to make sure that the provider will provide you with usage of their SMTP server. The latter is the software system which permits e-mail messages to be sent. SMTP is an acronym for Simple Mail Transfer Protocol and it addresses all outbound email messages from applications, webmail and contact web forms. Every time a message is sent out, the SMTP server confirms with the DNS servers worldwide where the e-mails for the receiving domain are taken care of and as soon as it gets this info, it will connect to the remote POP/IMAP server to check if the recipient mailbox exists. When it does, the SMTP server transmits the e-mail body and so the receiving server sends it to the mailbox in which the recipient can open it up and read it. With no SMTP server on your server, you won't be capable to mail out messages at all.