If you'd like to send e-mail messages using an email address with your personal domain, make sure that the provider will give you usage of their SMTP server. The latter is the software system allowing e-mail messages to be dispatched. SMTP is an acronym for Simple Mail Transfer Protocol and it deals with all outgoing emails from applications, webmail and contact web forms. Whenever a message is sent out, the SMTP server confirms with the DNS servers globally where the e-mails for the receiving domain name are managed and when it acquires this information, it creates a connection to the remote POP/IMAP server to check if the recipient mail box is available. When it does, the SMTP server delivers the email body while the receiving server sends it to the mail box in which the recipient can open it and see it. Without having a SMTP server on your end, you won't be capable to send e-mails in any way.