I've detected numerous random logins using root, admin, and other usernames through the panel.
I've enabled the Plesk panel, but it seems to be working. No random IP addresses are blocked.
Is there a way to fix this problem?
i not found error
Rejecting message: system user is not allowed to send mail
in /var/log/maillog
like https://support.plesk.com/hc/en-us/articles/12376927518359-PHP-mail-cannot-send-mail-on-Plesk-server-The-user-user-is-not-allowed-to-send-email
In my case, this is:
When selecting PHP...