If you need to send emails through an email address with your domain name, you have to make sure that the provider will provide you with access to their SMTP server. The aforementioned is the software which permits email messages to be transmitted. SMTP is an acronym for Simple Mail Transfer Protocol and it addresses all outbound email messages from programs, webmail and contact web forms. When a message is sent, the SMTP server checks with all the DNS servers globally where the emails for the receiving domain are taken care of and when it obtains this data, it will connect into the remote POP/IMAP server to find out if the recipient mailbox exists. In case it does, the SMTP server transmits the e-mail body and then the receiving server delivers it to the mail box where the recipient can open it and read it. Without having a SMTP server on your server, you won't be allowed to send out messages in any way.