In order for you to send email messages using an email address with your personal domain name, you have to make sure that the provider will give you usage of their SMTP server. The aforementioned is the software system which permits emails to be dispatched. SMTP is an acronym for Simple Mail Transfer Protocol and it handles all outbound e-mails from programs, webmail and contact web forms. Whenever a message is sent, the SMTP server confirms with the DNS servers around the world where the emails for the receiving domain are handled and when it acquires this data, it creates a connection to the remote POP/IMAP server to check if the recipient mailbox is out there. In case 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. Without having a SMTP server on your server, you won't be able to send emails in any way.