Email error discarded

[10NANCY]

Hi!
Can any one explain why we get email error discarded (system filter)?

[Carol.P]

Error discarded (system filter) occur because some spam keywords have been set that whenever and email with that particular keyword whether is header or in body wherever it might have been set is sent then consider that message as spam and directly discarded those emails before they reach the destination.
You can check the keywords under /etc/cpanel_exim_system_filter as all system filter are configured in /etc/cpanel_exim_system_filter. And the main thing is that we must be having the header or the body of the mail.
Once we are in that path ie /etc/cpanel_exim_system_filter. Then locate header_subject and message_body and search if the header or the body contents given is there or not. If it is there just comment that line with #.
That's it.