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Description

A poorly named "Mailserver" is essentially a Whisper node that stores message history in either a LevelDB or PostgreSQL database.

A Status app user can run their own Mailserver for faster message retrieval or additional security.

Service Ports

30303 TCP/UDP - DevP2P wire protocol port. Must ALWAYS be public.
8545 TCP - JSON RPC management port. Must NEVER be public.
9090 TCP - Prometheus metrics port. Should not be public.

Setup methods

This document describes the two alternative ways to start a Status Mailserver:

Docker Compose - More self-contained and portable
Systemd Service - More local and configurable

Docker Compose

The simplest way is to just use:

make run-mailserver-docker

This will generate the necessary config, compose and then start the container.

For more details read the README.

Systemd Service

The other way is to run the mailserver under systemd:

make run-mailserver-systemd

This will generate the necessary config, define and then start a user service. Use sudo if you want it to be a system service.

For more details read the README.

Service Healthcheck

There's two simple ways to verify your Mailserver is up and running.

Query Metrics

By making an HTTP request to the metrics port(9090 by default) you can check if you Mailserver is receiving envelopes:

 $ curl -s localhost:9090/metrics | grep '^whisper_envelopes_received_total'
whisper_envelopes_received_total 123

JSON RPC Calls

The JSON RPC port (8545 by default) allows you to manage your node. You can list connected peers by doing:

 $ export DATA='{"jsonrpc":"2.0","method":"admin_peers", "params": [], "id":1}'
 $ curl -s -H 'content-type: application/json' -d $DATA localhost:8545 \
     | jq -r '.result[].network.remoteAddress'
34.68.132.118:30305
134.209.136.123:30305
178.128.141.249:443

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