- Plesk 12.5 for Windows
The following security vulnerabilities are shown while checking the server:
54582 - SMTP Service Clear text Login Permitted
15855 - POP3 Clear text Logins Permitted
MailEnable Standard is installed as mail server.
How to fix these vulnerabilities?
The solution for this case is to enable SSL/TLS authentification for the mail server and disable other ways of authentification.
However, MailEnable Standard does not support SSL, only paid version Professional and higher.
It is required to upgrade MailEnable to Professional or install SmarterMail.