Bulwark
Get started

Shared mail and calendars for a small business.

Bulwark runs as one container next to your Stalwart server. The team gets shared mailboxes, shared calendars and files, and whoever looks after the IT gets a setup wizard and an admin console instead of config files.

Install with Docker Try the demo
A shared Support mailbox under Shared, next to the user's own foldersA shared Support mailbox under Shared, next to the user's own folders

The team works in Bulwark, and Stalwart keeps the mail.

Stalwart receives and sends mail, filters spam and holds every mailbox, including the shared ones you create as groups. Bulwark is the browser client on top: mail, calendar, contacts and files, and the settings the team shares.

One mailbox for info@, answered by everyone.

Create a group in Stalwart and its mailbox appears under Shared for every member. Replies go out from the group's address, and Drafts and Sent stay with the group.

Shared mailboxes
A reply being written from the shared Support mailbox, with the support address as the senderA reply being written from the shared Support mailbox, with the support address as the sender

Calendars the team can see, and free times when you invite.

Share a calendar and it shows in your colleagues' sidebar in its own colour. When you add people to an event, their busy times show, so you can pick a slot.

Calendar
A new event with three attendees, each marked busy or available at the chosen timeA new event with three attendees, each marked busy or available at the chosen time

Signatures, templates and out-of-office replies, set once.

Give everyone the same signature with their own name and phone, keep templates for the replies you write every week, and schedule an automatic reply for the holidays. Stalwart sends it even when nobody has the browser open.

Out of office
The out-of-office settings turned on, with dates and a short replyThe out-of-office settings turned on, with dates and a short reply

Edit office documents next to your mail.

Files keeps documents on the Stalwart server. Office editing needs a second server you run, Collabora Online or ONLYOFFICE; with it, Word, Excel and PowerPoint files open for editing in the browser. The public demo can't show this part.

Files
A spreadsheet from Files open for editing in the office editor inside BulwarkA spreadsheet from Files open for editing in the office editor inside Bulwark

Thunderbird and phone mail apps keep working.

Bulwark doesn't replace your mail server, so nothing moves and every app that reads your Stalwart accounts today keeps reading them. The company signature from Bulwark goes only on mail sent from Bulwark; Thunderbird keeps its own.

Moving from another webmail

Coming soon: assign a conversation to a colleague.

The team inbox plugin lets members assign a conversation, mark it done and filter for Assigned to me. It is coming to the extension directory; today an admin downloads team-inbox.zip from the plugins repository and uploads it in the admin console. It needs the full edition.

Team inbox
The shared Support mailbox with conversations assigned to colleagues and one marked doneThe shared Support mailbox with conversations assigned to colleagues and one marked done

Coming with Bulwark 1.20: e-invoices you can read.

The e-invoice plugin shows XRechnung and ZUGFeRD invoices as a readable invoice, checks the sums, and forwards them to accounting. It needs Bulwark 1.20, which is not released yet.

An invoice mail with the e-invoice plugin showing the supplier, line items and checked totalsAn invoice mail with the e-invoice plugin showing the supplier, line items and checked totals

Bulwark costs nothing.

Bulwark is open source under AGPL-3.0, with no paid edition and no licence per user. You pay for the server it runs on. Some Stalwart features, such as recovering deleted mail, need a Stalwart Enterprise licence. There is no paid support for Bulwark today; if you would want it, write to dev@bulwarkmail.org.

Install it with one container.

You need Docker and a Stalwart server. Step 3 puts a web server such as Caddy in front of Bulwark. That server gets the HTTPS certificate that phones and sign-ins from home need. Compose with Stalwart runs both together.

  1. 1
    Run the container.
    $ docker run -d --name bulwark -p 3000:3000 -v bulwark-data:/app/data ghcr.io/bulwarkmail/webmail:latest
  2. 2
    Run docker logs bulwark and open the setup link it prints. The wizard checks your Stalwart server and sets the admin password.
  3. 3
    Put your reverse proxy in front for HTTPS. The docs have examples for Caddy, nginx and Traefik.

What each part needs.

FeatureNeeds
Shared mailboxA group with a mailbox in Stalwart
Shared templates and tag namesStalwart 1.0
Free/busy and people pickersOn Stalwart 1.0, an admin turns on directory queries, the Stalwart setting that lets people look each other up
Office editingCollabora Online, ONLYOFFICE or EuroOffice, and the full edition
Team inbox (coming)The team inbox plugin, uploaded in the admin console, and the full edition
E-invoices (coming)The e-invoice plugin and Bulwark 1.20
Phone appThe beta app, from GitHub or TestFlight; not yet for your main mail. Until then, the webmail in the phone's browser, installed to the home screen over HTTPS

Start here.

InstallationOne container, the setup link from its log, and the wizard.Setting up StalwartWhat Stalwart needs before Bulwark connects.Shared mailboxesHow a Stalwart group shows up for its members.SignaturesOne signature for everyone, with each person's details.FilesFolders, sharing, previews and office editing.Bulwark MobileMail, calendar, contacts and files on Android and iOS, as a beta.