If you want to send emails using an e-mail address with your personal domain, you have to make sure that the company will provide you with usage of their SMTP server. The aforementioned is the software which enables e-mails to be sent. SMTP is an abbreviation for Simple Mail Transfer Protocol and it manages all outgoing email messages from applications, webmail and contact forms. Every time a message is sent out, the SMTP server checks with the DNS servers worldwide where the e-mails for the receiving domain name are managed and as soon as it obtains this information, it creates a connection to the remote POP/IMAP server to see if the recipient mail box is out there. In case it does, the SMTP server directs the message body and 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 will not be capable to send out emails at all.