I have been using Cloudflare Turnstile Captcha for a while because I was receiving a lot of spam messages from different Gmail addresses every time. That hasn't happened since then. However, I was recently told by my host that they have blocked my outgoing mail because it turned out that a lot of spam originates from there. Upon further investigation, this proved to be true, and once again from various fake Gmail accounts. Why are there these problems every time? I run another website where I use the Google invisible recaptcha, and I still occasionally receive incoming spam mail from various Gmail addresses there, but no problems with outgoing.

I've just reactivated Google ReCAPTCHA on my forms.