Service idea: Spam filter.

Regular mail service running along the following chain:



1. register, get public mail

2. indicate the real e-mail to which to send mail

3. on all sites we publish “public”, issued during the registration mail



Service:

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1. Sends a letter to all incoming emails - a spam test with the same captcha, for example

2. If the sender has passed the spam test - send to the recipient on the “real” mail

3. Add the sender to the “trusted” list for this user.



Lecture hall:



1. Service in demand. Spam - zadolbal all.



Chips:



1. The service is free.

2. You can score a list of “trusted” domain-recipients manually, import from address books, etc.

3. Move auto-delete spam to the folder, etc. etc.



Monetization:



1. Advertising at the end of the letter) or a subscription to the choice. Personally, I am ready for voluntary advertising in the necessary letters, because I hesitated to waste time on rubbish raking in search of important letters.



UPD: Here's a flash drive that demonstrates the essence of the idea: corp.spamarrest.com/howitworks2



UPD2: Russian free analogue found:

mail.km.ru

Problem solved