If you wish to send email messages through an email address with your domain, you have to make sure that the provider will provide you with usage of their SMTP server. The latter is the software allowing e-mail messages to be dispatched. SMTP is an abbreviation for Simple Mail Transfer Protocol and it deals with all outgoing e-mails from applications, webmail and contact web forms. Every time a message is sent, the SMTP server checks with all the DNS servers globally where the emails for the receiving domain are managed and when it obtains this data, it will connect to the remote POP/IMAP server to see if the recipient mailbox is available. When it does, the SMTP server sends the email body and the receiving server delivers it to the mailbox in which the recipient can open it up and read it. Without having a SMTP server on your end, you will not be capable to send messages at all.
