Mail Tab in the Plesk Control Panel
Here you can add or remove email addresses for a hosting subscription. Also shown are the usage statistics for each email address so you can pinpoint any over-quota problems. The Mail tab also permits access to creating Mailing Lists if this option has been enabled in the Admin panel.
Within the Change Settings option you can activate or disable mail service for the selected domain, specify how mail sent to non-existent users should be addressed, change your webmail default, or enable DomainKeys spam protection to sign outgoing mail:
Next: Applications Tab