handling spam from gmail.

[Alexander Dalloz]

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 at 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