If you would like to send e-mails through an email address with your personal domain name, make sure that the company will provide you with access to their SMTP server. The latter is the software that allows email messages to be sent out. SMTP is an abbreviation for Simple Mail Transfer Protocol and it handles all outbound emails from applications, webmail and contact forms. Every time a message is sent out, the SMTP server confirms with all of the DNS servers worldwide where the emails for the receiving domain name are managed and when it gets this data, it connects to the remote POP/IMAP server to check if the recipient mail box exists. When it does, the SMTP server directs the message body and so the receiving server delivers it to the mailbox where the recipient can open it up and see it. With no SMTP server on your server, you will not be allowed to send messages at all.