To suspend a email service for a specific domain, please follow the following steps :-
1) Login to Plesk control panel.

2) Click on "Subscriptions" and then Click on "Manage Hosting" in front of the domain whose suspened Mail services.


3) Click on "Mail tab" and then click on "Change Settings".

4) Uncheck the checkbox infront of "Activate mail service on domain" to suspend
email for this domain and Click "OK".

