Why is there no email or antispam service that replies by default with a link to a webpage with a captcha?
Maybe let it be valid for 24 hours or something.
If you solved the captcha then your mail drops into my inbox.
Or maybe you get a webform to say what you gotta say after the captcha. Maybe no attachments unless you fill in a webform and captcha..
Afterwards if i do reply to the mail it goes into a whitelist and you(or perhaps your domain?) don’t need to fill in captchas again.
There could tweaks like if you’ve solved the captcha then you get to email other addresses of my domain without the captcha requirement too.
Or even add the kyc kind of checks like… You get instructions to take a selfie holding a ok sign with your left hand and upload that.
And i get to add you to my whitelist after i look at the picture you’ve submitted…
I can even sort of imagine my phone doing this to incoming phone calls…it answers non-whitelisted numbers with…please dial seventeen plus the cube root of eight….hah