If you want to send out e-mail messages using an email address with your own domain name, make sure that the company will provide you with access to their SMTP server. The aforementioned is the software system that enables e-mails to be dispatched. SMTP is an abbreviation for Simple Mail Transfer Protocol and it addresses all outbound emails from applications, webmail and contact web forms. Whenever a message is sent out, the SMTP server checks with all of the DNS servers throughout the world where the e-mails for the receiving domain are handled and as soon as it obtains this info, it connects into the remote POP/IMAP server to see if the recipient mailbox is out there. In case it does, the SMTP server delivers the email body and the receiving server sends it to the mail box where the recipient can open it and see it. Without having a SMTP server on your end, you will not be allowed to send e-mails at all.