How can I add boddy test on spamassassin - virtualmin/webmin

Hello I am receiving empty emails as spam from my contact form at web site. I found under webmin server menu spamassassin mail filter. Also there is add test part for body and header. I think this place I must add someting about empty message. I want all empty message will be deleted directly, it doesn’t metter from whom.

Can anybody advice what should I do?


Don’t you think its better to fix your form with some checks so that they cant send empty forms, and maybe add some checks fighting spammers.