because current filter tools are not specific enough or easy enough to use for that purpose. i basically only got the option to mark something as spam and let the algorithm figure out why.

i'd like to sort email by these categories:

signed emails with a known/whitelisted key.

signed emails with a known/blacklisted key

signed emails with an unknown key.

unsigned emails with a known/whitelisted email address

unsigned emails with a known/blacklisted email address

unsigned emails with an unknown address.

and finally emails with obviously fake addresses.

whitelisted keys go to my inbox. those will be spam free.

blacklisted keys are blocked/bounced/sent to spam.

new keys go into a new contacts folder with a spam rating based on content. then i walk through that folder and accept or block keys.

for unsigned emails the same is done based on the address.

whitelisted addresses get a spam rating in a second inbox.

blacklisted addresses get blocked and unknown addresses get checked manually.

unknown keys or addresses can further be separated into: received only one email from this address or multiple emails.

when i reply to an email the key or address gets whitelisted automatically.