If you want to send e-mail messages through an e-mail address with your domain, you have to make sure that the provider will provide you with usage of their SMTP server. The aforementioned is the software that permits emails to be sent. SMTP is an abbreviation for Simple Mail Transfer Protocol and it addresses all outbound email messages from apps, webmail and contact forms. Every time a message is sent out, the SMTP server checks with all of the DNS servers worldwide where the emails for the receiving domain name are managed and once it gets this information, it creates a connection into the remote POP/IMAP server to see if the recipient mail box is available. When it does, the SMTP server delivers the message body while the receiving server delivers it to the mailbox in which the recipient can open it and read it. With no SMTP server on your server, you will not be able to mail out messages in any way.