If you need to send emails using an email address with your domain, you have to make sure that the provider will give you usage of their SMTP server. The aforementioned is the software system which enables e-mails to be sent out. SMTP is an abbreviation for Simple Mail Transfer Protocol and it deals with all outbound emails from applications, webmail and contact forms. Every time a message is sent out, the SMTP server confirms with all the DNS servers around the world where the emails for the receiving domain name are taken care of and once it acquires this data, it will connect into the remote POP/IMAP server to find out if the recipient mailbox is out there. 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 up and see it. With no SMTP server on your server, you will not be allowed to send out e-mails in any way.