Postrock supports DomainKeys, an e-mail authentication system designed to verify the DNS domain of an e-mail sender and the message integrity. Postrock automatically verifies incoming mail by using the DomainKeys system to check all e-mail messages coming to e-mail users under all domains hosted on the server. Postrock also allows signing outgoing mail. Selecting this option allows you to switch on support for DomainKeys e-mail signing through the domain administration screens of the control panel (Domains > domain name > Mail > Preferences > Use DomainKeys spam protection system to sign outgoing e-mail messages option).

Publishing your site means uploading web pages, scripts and graphic files that compose your site to your web space in any of the following ways: * Through FTP connection * Through Plesk File Manager * Through Secure Shell connection (only for users of Linux and FreeBSD operating systems) * Through Adobe Dreamweaver or Microsoft Expressions software (only for users of Microsoft Windows operating systems). FTP is one of the most common and easiest ways to upload files.