To switch on antivirus protection for a mailbox, perform the following steps:
1 - 1 - Logged in to Plesk, https://your domain name:8443.
2 - Go to Mail.
3 - Click on your mail from the list under Email Addresses tab.
4 - Click on Antivirus tab.
5 - Select the checkbox Switch on antivirus protection for this email address.
Choose the desired mail scanning mode. You can switch on scanning for incoming mail, outgoing mail, or both.
6 - Click OK.
When an infected message comes, you will be notified by email.