Features

Three things, done properly.

A team inbox, the API your product sends with, and the deliverability work that makes both of them arrive. Everything on these pages ships in v1 — what does not is listed on each page.

Inbox

Your team's mail, on your domain, with the parts nobody enjoys handled before you open it.

Sending API & SMTP

One JSON POST, or the SMTP relay if your code already speaks SMTP. Replies come back to a human.

Deliverability

The unglamorous half of email. Set up once, checked live, and enforced afterwards.

Agents

8 agents. None of them can press send.

Agents never send, delete or forward on their own — the runtime has no tool that can. Every action is logged, and you can switch AI off for a whole workspace.

Pitch Shield

Cold pitches, bounced

AI screens every stranger who writes to you. Pitches go to a pile you review when you feel like it, and real people always get through.

Promise Keeper

Nothing slips

Every “I'll send it Friday” is tracked, in both directions. You get a reminder before yours is due, and a polite nudge is drafted for theirs.

Customer Loop

Your product's email, answered

No more noreply. When someone replies to a receipt or a password reset, it lands in your team inbox threaded under the message that caused it.

Triage

Your inbox, pre-sorted

Cold pitches, promotions and notifications are filed before you look. What matters lands in Primary with a one-line summary.

Drafts

Replies waiting for you

For threads that need an answer, an agent pre-writes one in your tone from the thread itself. Review, tweak and send, or skip.

Follow-ups

The second email

Sent something and heard nothing? A polite nudge is drafted for you after the number of days you choose. You still press send.

Daily brief

Your morning in 60 seconds

What needs you, what is waiting on other people, and what your agents did overnight — as a card on Home and an email if you want one.

Ask your inbox

Search that answers

“What did the bank say about the payout?” gets an answer, with links to the exact messages it came from.

AI assistants

Works with Claude and ChatGPT.

Connect Koltrix to Claude, ChatGPT, Cursor or any app that speaks MCP, the open standard for giving AI assistants tools. You sign in and approve it once; it sees only the mailboxes you can, and an admin can switch it off for the whole workspace.

Works with Claude, ChatGPT, Cursor and any other MCP client. Read the setup guide.

Ask about your mail

Search, read a whole thread, or ask what still needs a reply, in plain words.

Keep it tidy

Labels, archive, read and star. Everything it changes can be undone.

Draft, never send

Replies wait in your Drafts until you review them and press send in Koltrix.

It can read and organise your mail and write drafts. It can never send, forward or delete anything.

Not in v1

What is coming, and is not here yet.

Listed so you can decide with the real picture. None of these is available today, and none of them is sold on any plan.

Agent mailboxes
Newsletters in the app
IMAP & SMTP for desktop mail clients