If you need to send out emails through an email address with your personal domain, make sure that the company will provide you with access to their SMTP server. The aforementioned is the software that permits e-mail messages to be sent out. SMTP is an acronym for Simple Mail Transfer Protocol and it handles all outbound email messages from apps, webmail and contact web forms. Every time a message is sent, the SMTP server confirms with all of the DNS servers around the world where the e-mails for the receiving domain name are taken care of and once it obtains this data, it connects into the remote POP/IMAP server to find out if the recipient mailbox exists. If it does, the SMTP server delivers the e-mail body and then the receiving server delivers it to the mail box in which the recipient can open it up and read it. Without an SMTP server on your server, you won't be allowed to mail out emails in any way.