README: Document how to set up the incoming email server.

Fixes: #237.
This commit is contained in:
Alex Vandiver
2025-10-21 15:06:54 +00:00
parent af07d3ef3d
commit b04977714d

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@@ -224,6 +224,13 @@ lists of IP addresses or CIDR ranges.
[smokescreen]: https://zulip.readthedocs.io/en/latest/production/deployment.html#customizing-the-outgoing-http-proxy
**Incoming email**: The Docker image exposes port 25, which is already
configured with Zulip's incoming email server. To use it, publish
port 25 of the Docker container, set `SETTING_EMAIL_GATEWAY_PATTERN`,
and add an MX record to your DNS configuration pointing to the Docker
container's public hostname (or wherever you chose to publicly expose
its port 25).
### Manual configuration
The way the environment variables configuration process described in