By default, your Plesk works in cooperation with a mail server, which enables you to run the mail services on the same machine on which you host websites.
The mail server settings are available in Tools & Settings > the Mail group. For details, see Configuring Server-Wide Mail Settings.
Mail Server Software
By default, the Postfix mail server and Courier IMAP are installed on Plesk for Linux, and MailEnable on Plesk for Windows.
Other supported software is Qmail and Dovecot on Linux (shipped with Plesk), and IceWarp or SmarterMail on Windows (need to be installed separately).
Using Plesk Without the Mail Server
Using the mail server in Plesk is optional. Plesk for Linux allows you to switch off or uninstall the mail service for all domains hosted on your server. On Windows, you cannot uninstall the default mail server, but you can change the server’s configuration to prohibit outgoing mail.
Removing Mail Functionality from the Customer Panel
You may want to prohibit your users from operating mail services, without you uninstalling the mail server. In this case, you can hide some mail-related UI elements.
