---
title: "The project mailbox, rebuilt around threads"
description: "Project email is now a threaded mailbox that syncs in the background, with a redesigned reading and compose experience — and Helix drafts replies inline for you to review before they send."
---

> Documentation Index
> Fetch the complete documentation index at: https://docs.heizen.work/llms.txt
> Use this file to discover all available pages before exploring further.

# The project mailbox, rebuilt around threads

Project email went from a message list you could send from to a mailbox you can
work out of.

## Threads, not messages

Mail is grouped into conversations. A thread opens as a stack of messages with
sender avatars, recipient details you can expand, and quoted history collapsed
out of the way until you want it — so a twelve-message chain reads as one thing
instead of twelve rows competing for attention.

Project mail also syncs in the background rather than only when you open the
page, so the mailbox is current when you get there.

## A faster mailbox

Thread listing was rebuilt to stop fetching message bodies it never renders.
Large project mailboxes open noticeably faster, and scrolling a long thread list
no longer waits on the server between pages.

## Helix drafts, you review

Ask Helix to reply to a thread or write a new mail and the draft appears inline
in the conversation — recipients, subject, and body laid out the way they will
send. You can edit it in place, open it in the full compose pane, or discard it.
Nothing leaves the mailbox until you send it.

Replies and forwards keep the thread's participants, subject, and quoted history
without you rebuilding any of it by hand.

## Also in this release

- When a project has no Gmail integration connected, the mailbox now says so and
  points at where to connect it, instead of rendering as an empty inbox.
- `create_bug` no longer returns a 500 for JSON requests — filing a bug from an
  MCP client or the API works with or without an attachment.
- Project search keeps matching projects visible after you apply a filter,
  rather than clearing the result you just searched for.

Source: https://docs.heizen.work/releases/1-12-3/index.mdx