Plesk Automation (PA) 11.1 supports the following versions of webmail clients:
- Horde 3.3.10
- Atmail 1.04
Since PA 11.5 Roundcube webmail was added, check release notes for the all the details:
[+] Roundcube for Webmail. Roundcube is now offered as a free webmail solution. Horde is also supported as in the previous releases. Atmail is no longer offered in new installations.
The webmail software listed above are automatically installed by default with PA on Management Node.
In current PA implementation there is no resource for limiting webmail usage on customer's subscription. If mail service exists on the subscription, customer will be able to select webmail:
Hosting Provider Panel > switch to the "Mail" tab > click "Change Settings" > select webmail
Ability to limit webmail usage via Service Templates will be added in future PA updates.