config.json

{
    "haraka": {
        "received_header": "Frappe Mail Agent",
        "nodes": 4,
        "host": "${HARAKA_HOST}",
        "port": "${HARAKA_PORT}",
        "username": "${HARAKA_USERNAME}",
        "password": "${HARAKA_PASSWORD}",
        "relay_acl_allow": "::1/128\n127.0.0.1/32",
        "plugins": {
            "inbound": [
                "tls",
                "headers",
                "mailauth",
                "inbound_hooks"
            ],
            "outbound": [
                "tls",
                "haraka-plugin-auth-enc-file",
                "headers",
                "outbound_hooks"
            ]
        }
    },
    "rabbitmq": {
        "host": "${RABBITMQ_HOST}",
        "port": "${RABBITMQ_PORT}",
        "virtual_host": "${RABBITMQ_VIRTUAL_HOST}",
        "username": "${RABBITMQ_USERNAME}",
        "password": "${RABBITMQ_PASSWORD}"
    },
    "queues": {
        "mail::outgoing_mails": {
            "max_priority": 3,
            "durable": true
        }
    },
    "consumers": {
        "mail::outgoing_mails": {
            "workers": 4,
            "auto_ack": false,
            "callback": "sendmail"
        }
    }
}