Re: handling spam from gmail.

Am 11.06.2020 um 16:58 schrieb Richard Siddall:

Marc Roos wrote:

...

I am sick of this gmail spam. Does anyone know a solution where I can do something like this:

1. received email from adcpni444@gmail.com
2. system recognizes this email address has been 'whitelisted', continue with 7.
3. system recognizes as this email never been seen before
4. auto reply with something like (maybe with a wait time of x hours): Your message did not receive the final recipient. You are sending from a known spam provider network that is why we blocked your message. Please confirm that: - you are not a spammer and - you have permission to use the mail adress you send your message to - you and your provider agree to uphold GDPR legislation - you and your provider are liable for damages when breaching any of the above.

    Click link to confirm and you agree with the above https://www.domainwithoutletsencryptcertificate.com/asdfasdfadsfaf

5. sender clicks confirm url
6. email address is added to some white list.
7. email is delivered to recipient.

This seems similar to the long-dead Active Spam Killer (https://directory.fsf.org/wiki/Active_Spam_Killer) with updates for GDPR.

The general name for such a system is challenge-response system.

https://en.wikipedia.org/wiki/Challenge%E2%80%93response_spam_filtering

There are enough reasons to discourage something like that.

Alexander