In order for you to send e-mails through an e-mail address with your own domain name, you have to make sure that the provider will provide you with usage of their SMTP server. The aforementioned is the software which allows e-mail messages to be sent. SMTP is an abbreviation for Simple Mail Transfer Protocol and it manages all outgoing email messages from applications, webmail and contact web forms. When a message is sent out, the SMTP server confirms with all the DNS servers worldwide where the e-mails for the receiving domain are handled and as soon as it obtains this info, it will connect to the remote POP/IMAP server to find out if the recipient mailbox is available. When it does, the SMTP server directs the e-mail body and so the receiving server delivers it to the mail box in which the recipient can open it and see it. Without having a SMTP server on your end, you will not be able to send e-mails at all.