How to Sort Your Gmail by Who You Actually Know

Short answer: Gmail sorts by time, so the most recent email wins, not the most important. To sort by relationship instead, you need a score for each sender based on your own history with them. Kith computes that score from your Gmail metadata and writes Kith/Inbox and Kith/Cold labels onto your mail in place, so the people you know rise to the top and cold senders drop to a pile you skim.

Why time-sorting fails

A standard inbox is a stack ordered by arrival. That treats a cold pitch sent thirty seconds ago as more important than a note from a close colleague sent an hour ago. The ordering carries no information about who matters. You end up doing the triage by hand, every time you open your inbox.

Gmail's tabs (Primary, Promotions, Social) and importance markers help a little, but they are coarse and global. They do not know your specific relationships.

Sort by relationship instead

The fix is to score each sender by their place in your relationship graph and order by that score. Concretely:

1. Build your graph from metadata. Who you reply to, how fast, how often, how recently, who you meet on threads, what you star. Headers only, never message content.
2. Score every sender with Personalized PageRank seeded on you, from 0 to 100. See PageRank for email.
3. Label in place. Apply a Kith/Inbox label to the people you actually know and Kith/Cold to the rest, as ordinary Gmail labels. New mail gets scored and labeled the moment it arrives.

You stay in Gmail the whole time. There is no new app to learn and nothing to migrate. Your existing inbox just gets smarter.

What you get

• The people who matter on top. Real correspondents, recent and sustained, score high and stay visible.
• Warm intros surfaced. A stranger that two of your trusted contacts both know is flagged as a warm intro, even if you have never emailed them.
• The cold flood out of the way. Authenticated cold pitches and forgotten newsletters drop to a list you check on your terms.
• Old relationships fade gracefully. Trust decays with time, so a contact from five years ago ranks below one you email this year.

Why labels, not a separate inbox

Anything that lives outside Gmail is something you will stop using. Labeling in place means the sort shows up in the inbox you already open all day, on every device, with no behavior change. That is the difference between a tool you try once and one you keep.

FAQ

Does it read my emails? No. Headers only: sender, recipients, date, thread, labels. No subject, body, or attachments.

Will it move mail out of my inbox? It labels mail so you can sort, filter, or auto-archive on your own terms. You stay in control.

Is this a spam filter? No. Spam filtering stays Gmail's job. This sorts the legitimate mail that gets through. See spam filter vs trust filter.

Is it private? Your graph and scores are computed from your own mail and never shared or made public. See personalized vs public reputation.