If you want to send emails using an e-mail address with your domain, make sure that the provider will provide you with usage of their SMTP server. The latter is the software system that enables e-mails to be dispatched. SMTP is an acronym for Simple Mail Transfer Protocol and it addresses all outbound emails from programs, webmail and contact web forms. Whenever a message is sent, the SMTP server checks with the DNS servers around the world where the emails for the receiving domain are taken care of and as soon as it acquires this data, it connects to the remote POP/IMAP server to find out if the recipient mailbox exists. When it does, the SMTP server transmits the email body and the receiving server delivers it to the mailbox where the recipient can open it up and read it. Without having a SMTP server on your end, you will not be able to send messages in any way.