What is mail_server_antispam.zip?

[overseer]

On all 3 CWP systems I am running, there is a zip file on the filesystem root:

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-rw-r--r--    1 root     root    41853 Apr 26 07:30 mail_server_antispam.zip

[cinique]

Thank you for spotting that file.
It is poor/sloppy file dumping by the developers! 
I see that I have one from 27th April on a CWP Pro instance - now deleted.
A relatively recent install of CWP doesn't have the file.
Goes off to check other servers..

There's also a razor-agent.log file in root

Edit: It looks as though older CWP instances have that file but newer installs don't.
Without changelogs we (users/customers) will never know.

[overseer]

That and the erroneous SpamAssassin logfile, literally named

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${SAHOME}spamd.log
instead of substituting a variable for the filename, it literally has the variable as the filename... all thanks to literally following the directions here:
https://wiki.centos-webpanel.com/how-to-configure-spamassassin