If you want to send email messages using an email address with your own domain name, you have to make sure that the provider will give you usage of their SMTP server. The aforementioned is the software enabling e-mail messages to be sent. SMTP is an abbreviation for Simple Mail Transfer Protocol and it manages all outgoing email messages from apps, webmail and contact forms. Every time a message is sent out, the SMTP server checks with the DNS servers around the world where the e-mails for the receiving domain name are taken care of and as soon as it obtains this information, it will connect to the remote POP/IMAP server to check if the recipient mailbox exists. If it does, the SMTP server transmits the e-mail body and so the receiving server delivers it to the mailbox where the recipient can open it and see it. Without an SMTP server on your end, you will not be able to send messages at all.