While Gmail does have some fuzzy intelligence with categorizing/flagging email when the sender address is in your contacts, is it possible to create a rule that explicitly performs some action of your choosing for any incoming mail where the sender's address is in Contacts? (Bonus: I want to also differentiate between contacts I manually enter vs the "auto-created contacts" that appear there.)
Simple example: I want to create a label called "From Contacts" and have a rule that applies said label to any incoming mail where the sender's email (or reply-to, if possible) is one of any of the addresses in my Gmail Contacts. Is this possible using Gmail's rules tool?