If you need to send emails using an email address with your domain, make sure that the provider will provide you with access to their SMTP server. The latter is the software system which permits e-mails to be sent out. SMTP is an abbreviation for Simple Mail Transfer Protocol and it manages all outgoing emails from applications, webmail and contact forms. Whenever a message is sent out, the SMTP server confirms with all the DNS servers globally where the emails for the receiving domain name are taken care of and when it acquires this data, it creates a connection to the remote POP/IMAP server to find out if the recipient mail box exists. If it does, the SMTP server delivers the e-mail body and then the receiving server sends it to the mail box in which the recipient can open it and see it. Without having a SMTP server on your server, you won't be allowed to send out e-mails in any way.