[mod-security-users] Blocking based on content posted

[Michael W. <mwa...@co...>]

I have a website that has a contact page on it that can reach out 20k or so members individually.  Lately spammers have been posting to that page to each member individually.  It is always the same message to each of them.  Is there an easy way to block this restricting it to the know posting URL and by scanning the posting for a know value that shows up every time. Like an email address per se.

Thanks

Michael