How does Spamassasin treat Mails with out subject/body(Empty mails) and mails with only Subject as numbers

[shiva prasad]

Hi guyzz,
               I need info as to what exactly is the spamassasin behavior in
the following scenarios

1)   Empty mail with no subject/body (I have this treated as SPAM in my
local pc with default configuration of spamassasin0

2) Email with subject in only numbers with nobody

Regards
shiva