If you wish to send out e-mails through an e-mail address with your personal domain, make sure that the provider will give you access to their SMTP server. The aforementioned is the software which enables email messages to be dispatched. SMTP is an abbreviation for Simple Mail Transfer Protocol and it manages all outgoing e-mails from apps, webmail and contact forms. Every time a message is sent out, the SMTP server checks with all the DNS servers around the world where the emails for the receiving domain are managed and once it gets this data, it creates a connection to the remote POP/IMAP server to check if the recipient mailbox is out there. If it does, the SMTP server directs the message body while the receiving server delivers it to the mail box where the recipient can open it and see it. Without having a SMTP server on your server, you will not be able to send emails at all.