If you wish to send e-mails through an email address with your domain, you have to make sure that the provider will provide you with usage of their SMTP server. The aforementioned is the software which permits e-mail messages to be dispatched. SMTP is an abbreviation for Simple Mail Transfer Protocol and it deals with all outgoing emails from programs, webmail and contact forms. When a message is sent, the SMTP server confirms with all the DNS servers throughout the world where the e-mails for the receiving domain are managed and when it acquires this information, it creates a connection to the remote POP/IMAP server to find out if the recipient mail box is out there. In case it does, the SMTP server delivers the message body and so the receiving server delivers it to the mail box where the recipient can open it up and read it. Without having a SMTP server on your end, you will not be allowed to send e-mails at all.