About

Docker image for addy.io, an anonymous email forwarding service.

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• Features
• Build locally
• Image
• Environment variables
  • General
  • App
  • Database
  • Redis
  • Mail
  • Postfix
  • RSPAMD
• Volumes
• Ports
• Usage
  • Docker Compose
• Upgrade
• Notes
  • anonaddy command
  • Create user
  • Generate DKIM private/public keypair
  • Generate GPG key
  • Define additional env vars
  • Override Postfix main configuration
  • Spamhaus DQS configuration
• Contributing
• License

Features

• Run as non-root user
• Multi-platform image
• s6-overlay as process supervisor
• Traefik as reverse proxy and creation/renewal of Let's Encrypt certificates (see this template)

Build locally

git clone https://github.com/anonaddy/docker.git docker-addy
cd docker-addy

# Build image and output to docker (default)
docker buildx bake

# Build multi-platform image
docker buildx bake image-all

Image

Following platforms for this image are available:

$ docker buildx imagetools inspect anonaddy/anonaddy --format "{{json .Manifest}}" | \
  jq -r '.manifests[] | select(.platform.os != null and .platform.os != "unknown") | .platform | "\(.os)/\(.architecture)\(if .variant then "/" + .variant else "" end)"'

linux/amd64
linux/arm/v6
linux/arm/v7
linux/arm64

Environment variables

General

• TZ: The timezone assigned to the container (default UTC)
• PUID: user id (default 1000)
• PGID: group id (default 1000)
• MEMORY_LIMIT: PHP memory limit (default 256M)
• UPLOAD_MAX_SIZE: Upload max size (default 16M)
• CLEAR_ENV: Clear environment in FPM workers (default yes)
• OPCACHE_MEM_SIZE: PHP OpCache memory consumption (default 128)
• LISTEN_IPV6: Enable IPv6 for Nginx and Postfix (default true)
• REAL_IP_FROM: Trusted addresses that are known to send correct replacement addresses (default 0.0.0.0/32)
• REAL_IP_HEADER: Request header field whose value will be used to replace the client address (default X-Forwarded-For)
• LOG_IP_VAR: Use another variable to retrieve the remote IP address for access log_format on Nginx. (default remote_addr)
• LOG_CROND: Enable crond logging. (default true)

App

• APP_NAME: Name of the application (default addy.io)
• APP_KEY: Application key for encrypter service. You can generate one through anonaddy key:generate --show or echo "base64:$(openssl rand -base64 32)". required
• APP_DEBUG: Enables or disables debug mode, used to troubleshoot issues (default false)
• APP_URL: The URL of your installation
• ANONADDY_RETURN_PATH: Return-path header for outbound emails
• ANONADDY_ADMIN_USERNAME: If set this value will be used and allow you to receive forwarded emails at the root domain
• ANONADDY_ENABLE_REGISTRATION: If set to false this will prevent new users from registering on the site (default true)
• ANONADDY_DOMAIN: Root domain to receive email from required
• ANONADDY_HOSTNAME: FQDN hostname for your server used to validate records on custom domains that are added by users
• ANONADDY_DNS_RESOLVER: Custom domains that are added by users to validate records (default 127.0.0.1)
• ANONADDY_ALL_DOMAINS: If you would like to have other domains to use (e.g. @username.example2.com), set a comma separated list like so, example.com,example2.com (default $ANONADDY_DOMAIN)
• ANONADDY_SECRET: Long random string used when hashing data for the anonymous replies required
• ANONADDY_LIMIT: Number of emails a user can forward and reply per hour (default 200)
• ANONADDY_BANDWIDTH_LIMIT: Monthly bandwidth limit for users in bytes domains to use (default 104857600)
• ANONADDY_NEW_ALIAS_LIMIT: Number of new aliases a user can create each hour (default 10)
• ANONADDY_ADDITIONAL_USERNAME_LIMIT: Number of additional usernames a user can add to their account (default 10)
• ANONADDY_SIGNING_KEY_FINGERPRINT: GPG key used to sign forwarded emails. Should be the same as your mail from email address
• ANONADDY_DKIM_SIGNING_KEY: Path to the private DKIM signing key to be used to sign emails for custom domains.
• ANONADDY_DKIM_SELECTOR: Selector for the current DKIM signing key (default default)

Note

APP_KEY_FILE, ANONADDY_SECRET_FILE and ANONADDY_SIGNING_KEY_FINGERPRINT_FILE can be used to fill in the value from a file, especially for Docker's secrets feature.

Database

• DB_HOST: MySQL database hostname / IP address required
• DB_PORT: MySQL database port (default 3306)
• DB_DATABASE: MySQL database name (default anonaddy)
• DB_USERNAME: MySQL user (default anonaddy)
• DB_PASSWORD: MySQL password
• DB_TIMEOUT: Time in seconds after which we stop trying to reach the MySQL server (useful for clusters, default 60)

Note

DB_USERNAME_FILE and DB_PASSWORD_FILE can be used to fill in the value from a file, especially for Docker's secrets feature.

Redis

• REDIS_HOST: Redis hostname / IP address
• REDIS_PORT: Redis port (default 6379)
• REDIS_PASSWORD: Redis password

Note

REDIS_PASSWORD_FILE can be used to fill in the value from a file, especially for Docker's secrets feature.

Mail

• MAIL_FROM_NAME: From name (default addy.io)
• MAIL_FROM_ADDRESS: From email address (default addy@${ANONADDY_DOMAIN})
• MAIL_ENCRYPTION: Encryption protocol to send e-mail messages (default null)

Postfix

• POSTFIX_DEBUG: Enable debug (default false)
• POSTFIX_MESSAGE_SIZE_LIMIT: The maximal size in bytes of a message, including envelope information (default 26214400)
• POSTFIX_SMTPD_TLS: Enabling TLS in the Postfix SMTP server (default false)
• POSTFIX_SMTPD_TLS_CERT_FILE: File with the Postfix SMTP server RSA certificate in PEM format
• POSTFIX_SMTPD_TLS_KEY_FILE: File with the Postfix SMTP server RSA private key in PEM format
• POSTFIX_SMTP_TLS: Enabling TLS in the Postfix SMTP client (default false)
• POSTFIX_RELAYHOST: Default host to send mail to
• POSTFIX_RELAYHOST_AUTH_ENABLE: Enable client-side authentication for relayhost (default false)
• POSTFIX_RELAYHOST_USERNAME: Postfix SMTP Client username for relayhost authentication
• POSTFIX_RELAYHOST_PASSWORD: Postfix SMTP Client password for relayhost authentication
• POSTFIX_SPAMHAUS_DQS_KEY: Personal key for Spamhaus DQS

Note

POSTFIX_RELAYHOST_USERNAME_FILE and POSTFIX_RELAYHOST_PASSWORD_FILE can be used to fill in the value from a file, especially for Docker's secrets feature.

RSPAMD

• RSPAMD_ENABLE: Enable Rspamd service. (default false)
• RSPAMD_WEB_PASSWORD: Rspamd web password (default null)
• RSPAMD_NO_LOCAL_ADDRS: Disable Rspamd local networks (default false)

Note

RSPAMD_WEB_PASSWORD_FILE can be used to fill in the value from a file, especially for Docker's secrets feature.

Warning

DKIM private key must be located in /data/dkim/${ANONADDY_DOMAIN}.private. You can generate a DKIM private/public keypair by following this note.

Warning

Rspamd service is disabled if DKIM private key is not found

Warning

Rspamd service needs to be enabled for the reply anonymously feature to work.
See #169 for more details.

Volumes

• /data: Contains storage

Warning

Note that the volume should be owned by the user/group with the specified PUID and PGID. If you don't give the volume correct permissions, the container may not start.

Ports

• 8000: HTTP port (addy.io)
• 11334: HTTP port (rspamd web dashboard)
• 25: SMTP port (postfix)

Usage

Docker Compose

Docker compose is the recommended way to run this image. You can use the following docker compose template, then run the container:

docker compose up -d
docker compose logs -f

Upgrade

docker compose pull
docker compose up -d

Notes

anonaddy command

If you want to use the artisan command to perform common server operations like manage users, passwords and more, type:

docker compose exec addy anonaddy <command>

For example to list all available commands:

docker compose exec addy anonaddy list

Create user

docker compose exec addy anonaddy anonaddy:create-user "username" "webmaster@example.com"

Generate DKIM private/public keypair

docker compose run --entrypoint '' addy gen-dkim

generating private and storing in data/dkim/example.com.private
generating DNS TXT record with public key and storing it in data/dkim/example.com.txt

default._domainkey IN TXT ( "v=DKIM1; k=rsa; "
        "p=***"
        "***"
) ;

The keypair will be available in /data/dkim.

Generate GPG key

If you don't have an existing GPG key, you can generate a new GPG key with the following command:

docker compose exec --user anonaddy addy gpg --full-gen-key

Keys will be stored in /data/.gnupg folder.

Define additional env vars

You can define additional environment variables that will be used by the app by creating a file named .env in /data.

Override Postfix main configuration

In some cases you may want to override the default Postfix main configuration to fit your infrastructure. To do so, you can create a file named postfix-main.alt.cf in /data and it will be used instead of the generated configuration. Use at your own risk.

Warning

Container has to be restarted to propagate changes

Spamhaus DQS configuration

If a public DNS resolver is used, it may be blocked by Spamhaus and return a 'non-existent domain' (NXDOMAIN), and soon will start to return an error code:

Aug  3 10:15:40 mail01 postfix/smtpd[23645]: NOQUEUE: reject: RCPT from sender.example.com[xx.xx.xx.xx]: 554 5.7.1 Service unavailable;
Client host [xx.xx.xx.xx] blocked using zen.spamhaus.org; Error: open resolver; https://www.spamhaus.org/returnc/pub/162.158.148.77;
from=<sender@example.com> to=<recipient@example.com> proto=ESMTP helo=<icinga2.infiniroot.net>

To fix this issue, you can register a DQS key here and complete the registration procedure. After you register an account, you can find the DQS key in the "Access" section of this page.

Contributing

Want to contribute? Awesome! The most basic way to show your support is to star the project, or to raise issues. You can also support this project by becoming a sponsor on GitHub or by making a PayPal donation to ensure this journey continues indefinitely!

Thanks again for your support, it is much appreciated! 🙏

License

MIT. See LICENSE for more details.