If you would like to send emails through an email address with your personal domain name, you have to make sure that the company will provide you with access to their SMTP server. The aforementioned is the software that enables e-mails to be transmitted. SMTP is an acronym for Simple Mail Transfer Protocol and it manages all outbound e-mails from apps, webmail and contact forms. Whenever a message is sent, the SMTP server confirms with all of the DNS servers throughout the world where the emails for the receiving domain name are taken care of and as soon as it obtains this information, it connects to the remote POP/IMAP server to see if the recipient mailbox is available. When it does, the SMTP server sends the e-mail body and so 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 won't be capable to send emails at all.