If you need to send out email messages through an e-mail address with your domain, make sure that the company 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 emails from apps, webmail and contact forms. When a message is sent, the SMTP server confirms with the DNS servers worldwide where the emails for the receiving domain are taken care of and as soon as it obtains this information, it creates a connection to the remote POP/IMAP server to check if the recipient mail box is available. When it does, the SMTP server sends the e-mail body and so the receiving server delivers it to the mailbox where the recipient can open it up and see it. With no SMTP server on your server, you won't be able to mail out emails in any way.