mailscanner rules

[Simon Something]

hi,

appreciate if you could let me know a few queries i have

i am using

redHat 8
sendmail 8.12.5-7
mailscanner 4.28
clamav .67
spamassassain 2.31

1) when i see the maillog i see th following entry

Allowing i2T6hs6W004947 msg-1586-39.html (no rule matched)

but in filename.rules.conf or filetype.rules.conf i dont see any entry for
deny or allow .html .
appreciate if u can let me know

Thanks and Regards

simon