You can install on the server a number of webmail software packages and select which of them should be available to your users. Alternately, you can redirect your users to an external webmail service. To do this, register an external webmail service address with the Panel by adding a corresponding record.
All installed webmail packages and registered external webmail services are listed in the mail settings of hosting plans and subscriptions (on the Mail tab). There you can select which webmail to provision to users.
To register an external webmail service:
http:// or https:// prefix.To change the properties of an external webmail record:
To make a webmail service unavailable for inclusion into hosting plans:
This works for installed webmail software packages and for links to external webmail services.
This way you can remove only links to external webmail services. Installed software packages can be removed only by means of Parallels Products Installer (Tools & Utilities > Updates).