How to Enable / Disable Mail Services for a domain in Plesk

To switch the mail service on or off for a domain, perform the following steps:

1 – Logged in to Plesk.
2 – Go Mail.
3 – Open Mail Settings tab.
4 – Select the domain name.
5 – Click Activate/Deactivate Services.
6 – Change Mail service status
7 – Click OK.