: Bots target website contact forms that don't have CAPTCHA protection, using them to send messages directly to the site owner's Gmail inbox [3]. Risks to Users

Gmail possesses one of the most sophisticated spam filtering infrastructures in the world. Attempting to "bot" Gmail is technically difficult because of multi-layered detection systems:

Most users think spam is just an annoyance. That’s a dangerous misconception. Here’s what modern spam bots are really after: