If you'd like to send emails using an email address with your own domain name, make sure that the provider will provide you with usage of their SMTP server. The latter is the software system which allows email messages to be sent. SMTP is an abbreviation for Simple Mail Transfer Protocol and it addresses all outbound email messages from programs, webmail and contact forms. When a message is sent, the SMTP server checks with all of the DNS servers worldwide where the e-mails for the receiving domain name are managed and when it gets this info, it will connect into the remote POP/IMAP server to see if the recipient mailbox is out there. When it does, the SMTP server directs the e-mail body and so the receiving server sends it to the mailbox in which the recipient can open it and read it. With no SMTP server on your end, you won't be capable to send out e-mails at all.