Email bridge
made by etke.cc

The Email bridge installed by us is powered by postmoogle.

• Full documentation
• Source code
• Support

This page shows you how to set up the email bridge using Cinny client app (available as an add-on component).

Overview¶

With the email bridge, you can:

• receive emails to custom addresses (like something@matrix.example.com) and have these emails delivered to Matrix rooms
• send outgoing emails
• and many more things

Usage¶

To use the bridge, create a room and invite @emailbot:your-server.com (or @postmoogle:your-server.com if your server was installed before October 2023).

When it joins, the bot sends a help message to the room. You can receive the instruction by sending !pm help as well.

Creating a mailbox¶

To create a mailbox, send !pm mailbox SOME_INBOX to the bridge’s bot.

The bot returns the mail address which you can use to receive messages to SOME_INBOX@matrix.your-server.com and send messages using the !pm send command.

Registering DomainKeys Identified Mail (DKIM)¶

To avoid messages from being quarantined as spam at recipient’s mail servers, it is essential to set an authentication method such as DKIM, SPF, and DMARC for your hostname.

You can set DKIM by following the steps below:

1. Send !pm dkim to the bridge bot and copy the signature from the bot response
2. Add new DNS record with type = TXT, key (subdomain/from): postmoogle._domainkey.matrix and value: signature copied from the !pm dkim response

After configuring DKIM, it is recommended to check mail deliverability by using online services like mail-tester.com, dkimvalidator.com.

⚠️ Note: even if your configuration is complete, it is likely that you will experience deliverability issues due to numerous unknown factors regarding to high centralization around big email service providers (e.g., Gmail, Outlook, Yahoo, etc.)