If you would like to send e-mails using an email address with your own domain name, make sure that the provider will provide you with access to their SMTP server. The latter is the software that allows email messages to be transmitted. SMTP is an acronym for Simple Mail Transfer Protocol and it addresses all outbound e-mails from apps, webmail and contact forms. Whenever a message is sent out, the SMTP server confirms with the DNS servers worldwide where the e-mails for the receiving domain are taken care of and once it obtains this data, it connects to the remote POP/IMAP server to find out if the recipient mail box is available. When it does, the SMTP server transmits the e-mail body and so the receiving server delivers it to the mail box where the recipient can open it and see it. With no SMTP server on your end, you won't be capable to send out messages at all.