If you need to send out email messages using an e-mail address with your domain, make sure that the provider will give you usage of their SMTP server. The latter is the software system that enables email messages to be dispatched. SMTP is an abbreviation for Simple Mail Transfer Protocol and it manages all outbound e-mails from apps, webmail and contact forms. Whenever a message is sent, the SMTP server confirms with all of the DNS servers around the world where the emails for the receiving domain name are taken care of and once it acquires this information, it connects to the remote POP/IMAP server to see if the recipient mail box exists. When it does, the SMTP server directs the message body and then the receiving server sends it to the mailbox where the recipient can open it and read it. Without an SMTP server on your end, you will not be allowed to send emails in any way.