{"success":true,"data":{"id":"hidden-text-in-body","label":"Hidden text via CSS — display:none / visibility:hidden / white-on-white (classifier-poisoning)","description":"HTML body contains text wrapped in an inline style that hides it from the visible render — display:none, visibility:hidden, or near-white text color (#fff / #ffffff / rgb(255,255,255) / keyword `white`). Spammers use this to salt their email with legit-sounding words that confuse AI classifiers and keyword filters without the user ever seeing them. Note: some legitimate newsletter platforms (Mailchimp, Klaviyo) use `display:none` preheader text for the inbox preview blurb, so this signal is weighted moderately and designed to combine with other signals rather than trigger alone.","tier":"danger","category":"body","isThin":false}}