If you need to send emails using an e-mail address with your own domain, you have to make sure that the provider will provide you with usage of their SMTP server. The aforementioned is the software allowing e-mail messages to be transmitted. SMTP is an abbreviation for Simple Mail Transfer Protocol and it manages all outgoing e-mails from programs, webmail and contact forms. Whenever a message is sent, the SMTP server confirms with all the DNS servers around the world where the emails for the receiving domain are handled and as soon as it acquires this info, it will connect to the remote POP/IMAP server to see if the recipient mail box is out there. If it does, the SMTP server directs the e-mail body and then the receiving server delivers it to the mail box where the recipient can open it and read it. Without an SMTP server on your server, you will not be able to send emails at all.