If you'd like to send e-mails through an e-mail address with your own domain name, make sure that the company will give you usage of their SMTP server. The aforementioned is the software system which permits e-mails to be dispatched. SMTP is an acronym for Simple Mail Transfer Protocol and it handles all outgoing email messages from apps, webmail and contact forms. Whenever a message is sent, the SMTP server checks with all the DNS servers globally where the e-mails for the receiving domain are managed and when it acquires this info, it connects into the remote POP/IMAP server to check if the recipient mail box is out there. If it does, the SMTP server transmits the e-mail body and the receiving server sends it to the mailbox where the recipient can open it and read it. Without an SMTP server on your end, you will not be able to send out messages in any way.