Multiple Proxies

For advanced use cases, Reacher supports a routing mechanism to route email verification requests to different proxies depending on the MX host.

The configuration is divided in 2 steps:

1. Define a list of proxies. e.g. "proxy1", "proxy2"etc...

2. Define routing rules, e.g. route Gmail to "proxy1", route Hotmail B2B to "proxy2"etc...

1. Define a list of Proxies

The simple Reacher configuration allows to define a default proxy via the following environmental variables:

• RCH__PROXY__HOST: The hostname of the proxy.

• RCH__PROXY__PORT: The port of the proxy.

• RCH__PROXY__USERNAME: (Optional) A username for authentication.

• RCH__PROXY__PASSWORD: (Optional) A password for authentication.

On top of the default proxy, Reacher allows you to configure multiple other proxies:

• RCH__OVERRIDES__PROXIES__{your-proxy-id-uppercase}__HOST

• RCH__OVERRIDES__PROXIES__{your-proxy-id-uppercase}__PORT

• RCH__OVERRIDES__PROXIES__{your-proxy-id-uppercase}__USERNAME

• RCH__OVERRIDES__PROXIES__{your-proxy-id-uppercase}__PASSWORD

Replace {your-proxy-id-uppercase}with any unique name of your choosing. We recommend to use PROXY1, PROXY2 for simplicity.

2. Define routing rules

Reacher allows to configure custom routing rules based on the MX host. To do so, set the following environment variables:

• RCH__OVERRIDES__{email-provider}__TYPE=smtp

• RCH__OVERRIDES__{email-provider}__PROXY={your-proxy-id-lowercase}

where you replace:

• {email-provider} with one of the following GMAIL, HOTMAILB2B, HOTMAILB2C, PROOFPOINT, MIMECAST, YAHOO.

• {your-proxy-id-lowercase} with one of the proxies you defined in step 1. Make sure to respect the lowercase here.

You can define multiple of these RCH__OVERRIDES__ environment variables for different MX hosts. All the remaining emails which don't match any of the overrides will go through the default proxy.

Example

Below is a Docker Compose file showcasing:

• routing Gmail and Proofpoint emails to proxy1

• routing Hotmail B2B emails to proxy2

• routing everything else to the default proxy

services:
  worker:
    image: reacherhq/commercial-license-trial:v0.11.0
    container_name: test
    ports:
      - "8080:8080"
    environment:
      RCH__BACKEND_NAME: backend4-do
      RUST_LOG: reacher=info
      # Default proxy
      RCH__PROXY__HOST: my.default.proxy.com
      RCH__PROXY__PORT: 1081
      RCH__PROXY__USERNAME: user0
      RCH__PROXY__PASSWORD: pass0
      RCH__HELLO_NAME: my.default.proxy.com
      RCH__FROM_EMAIL: [e-mail]
      # Proxy 1
      RCH__OVERRIDES__PROXIES__PROXY1__HOST: 11.22.33.44
      RCH__OVERRIDES__PROXIES__PROXY1__PORT: 1081
      RCH__OVERRIDES__PROXIES__PROXY1__USERNAME: user1
      RCH__OVERRIDES__PROXIES__PROXY1__PASSWORD: pass1
      # Proxy 2
      RCH__OVERRIDES__PROXIES__PROXY2__HOST: 55.66.77.88
      RCH__OVERRIDES__PROXIES__PROXY2__PORT: 1081
      RCH__OVERRIDES__PROXIES__PROXY2__USERNAME: user2
      RCH__OVERRIDES__PROXIES__PROXY2__PASSWORD: pass2
      # Route Google to Proxy 1
      RCH__OVERRIDES__GMAIL__TYPE: smtp
      RCH__OVERRIDES__GMAIL__PROXY: proxy1
      # Route Proofpoint to Proxy 1
      RCH__OVERRIDES__PROOFPOINT__TYPE: smtp
      RCH__OVERRIDES__PROOFPOINT__PROXY: proxy1
      # Route Hotmail B2B to Proxy 2
      RCH__OVERRIDES__HOTMAILB2B__TYPE: smtp
      RCH__OVERRIDES__HOTMAILB2B__PROXY: proxy2
      RCH__OVERRIDES__HOTMAILB2B__HELLO_NAME: my.proxy2.com       # Optionally override the HELO/EHLO name
      RCH__OVERRIDES__HOTMAILB2B__FROM_EMAIL: [e-mail] # Optionally override the MAIL FROM email.
      # Worker config
      RCH__WORKER__ENABLE: false
    restart: always