The recipients don’t view my email address

You will have to setup the SPF and DKIM records in your domain’s DNS. Please contact your webmaster for that. In the Email Settings page you can view the SPF and DKIM records you have to setup.

Why? Using SPF and DKIM you are authorizing Ether Mailer to send emails using your domain. Otherwise, everybody could use your domain to send emails – we don’t want that, do we?