If you want to send emails using an email address with your domain name, you have to make sure that the provider will provide you with usage of their SMTP server. The aforementioned is the software which permits e-mails to be sent. SMTP is an abbreviation for Simple Mail Transfer Protocol and it handles all outbound e-mails from applications, webmail and contact forms. When a message is sent, the SMTP server confirms with all of the DNS servers globally where the emails for the receiving domain name are taken care of and as soon as it obtains this data, it will connect into the remote POP/IMAP server to find out if the recipient mailbox exists. When it does, the SMTP server sends the email body while the receiving server sends it to the mail box where the recipient can open it up and read it. With no SMTP server on your server, you won't be able to send out messages in any way.