KanmailTurn Fastmail into a kanban board
Kanmail is the view your Fastmail setup has been missing: each folder pinned as a column, threads dragged between them, a saved board for every project on the go.
For people who treat their inbox like a tool, not a feed.
Most Fastmail users got here by being picky — about deliverability, about who has their real address, about whether a client is going to leak their reading habits to advertisers. The web app is great at handling one message at a time, but a Sieve rule that splits work across four folders gives you four places to look on Monday morning. Kanmail lays those folders out as columns so the whole pipeline shows up in one glance instead of four clicks.
Folders become columns
Pin Inbox, Triage, Waiting on reply, Read later next to each other and shove threads from one to the next with the cursor. Copy mode mirrors a thread into a second column the way Fastmail labels do — useful when something belongs to both a client folder and the follow-up queue.
A board for every hat you wear
Save a column layout per context and switch with a keystroke: a contracting board with the client folders front and center, a Sunday board that's nothing but newsletters and receipts, a launch-week board pulling the support alias and the press alias side by side. Each one remembers exactly which folders it cares about.
All your aliases under one roof
Custom domains, masked aliases generated from 1Password or Bitwarden, the partner's family-plan account, the @fastmail.com you'll never tell anyone — every identity gets a color accent so you can see which one a thread landed on before you start typing the reply in the wrong voice.
Maya, indie maker
Columns: Inbox, Triage, Waiting, CustomersThree side projects, three custom domains, and I used to lose track of which launch was waiting on which customer. Now each one has its own column and I can see the whole pipeline before my coffee's gone cold.
Sign in with a Fastmail app password
Fastmail doesn't hand out OAuth to third-party clients — it issues app passwords instead, scoped to the bits you choose. Generate one for mail in your Fastmail settings, drop it into Kanmail, and the connection is live. Your real account password never leaves Fastmail, and you can revoke the app password from the same screen the moment you stop using Kanmail.
Your email stays on your device
Kanmail speaks IMAP and SMTP directly to Fastmail from your laptop — there is no Kanmail server in the middle and no copy of your mail in our cloud, because we don't run one. Threads are cached on disk so the board stays snappy offline. Tracker pixels and remote images stay blocked until you ask for them; Fastmail already strips a lot of that on the way in, and Kanmail catches what survives.
Try Kanmail with Fastmail
A one-time $49 for a lifetime of a sane inbox. Free to try, no time limit.