If you need to send out email messages through an email address with your very own domain name, make sure that the provider will give you usage of their SMTP server. The latter is the software system that permits e-mails to be sent out. SMTP is an abbreviation for Simple Mail Transfer Protocol and it manages all outgoing e-mails from programs, webmail and contact web forms. Whenever a message is sent out, the SMTP server checks with all the DNS servers around the world where the emails for the receiving domain are managed and as soon as it gets this information, it creates a connection into the remote POP/IMAP server to check if the recipient mail box exists. In case it does, the SMTP server directs the e-mail body and the receiving server delivers it to the mail box where the recipient can open it up and see it. Without having a SMTP server on your server, you won't be allowed to send out emails at all.