tiredofit/docker-postal tiredofit/docker-postal

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  • Rank 680,660 (Top 14 %)
  • Language
    Dockerfile
  • License
    MIT License
  • Created over 6 years ago
  • Updated almost 2 years ago
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tiredofit/docker-postal
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tiredofit

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Repository Details

Dockerized Postal SMTP Server based on Alpine Linux and Ruby

github.com/tiredofit/docker-postal

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About

Dockerfile to build a Postal SMTP server for sending and receiving SMTP / HTTP API email.

  • Contains Fail2Ban for blocking repeat authentication offenders

Maintainer

Prerequisites and Assumptions

Installation

Build from Source

Clone this repository and build the image with docker build <arguments> (imagename) .

Prebuilt Images

Builds of the image are available on Docker Hub and is the recommended method of installation.

The following image tags are available along with their tagged release based on what's written in the Changelog:

Container OS Tag
Alpine :latest

Multi Architecture

Images are built primarily for amd64 architecture, and may also include builds for arm/v6, arm/v7, arm64 and others. These variants are all unsupported. Consider sponsoring my work so that I can work with various hardware. To see if this image supports multiple architecures, type docker manifest (image):(tag)

Configuration

Quick Start

Persistent Storage

The following directories are used for configuration and can be mapped for persistent storage.

Directory Description
/config/ Auto generated Postal Config and Signing Key resides here
/logs/ Logfiles
/assets/custom Optional Use this to drop files overop of the Postal sourcode for cherry picked overrides of files

Environment Variables

Base Images used

This image relies on an Alpine Linux base image that relies on an init system for added capabilities. Outgoing SMTP capabilities are handlded via msmtp. Individual container performance monitoring is performed by zabbix-agent. Additional tools include: bash,curl,less,logrotate, nano,vim.

Be sure to view the following repositories to understand all the customizable options:

Image Description
OS Base Customized Image based on Alpine Linux

Admin Accounts

Parameter Description Default
ADMIN_EMAIL Email address of admin [email protected]
ADMIN_FNAME Name of Admin First Name Postal
ADMIN_LNAME Name of Admin Last Name Admin
ADMIN_PASS Password of Admin user PostalMailServer

Application Settings

Parameter Description Default
ENABLE_TRACKING Enable Click Tracking true or false true
MAX_DELIVERY_ATTEMPTS Maximum Delivery Attempts before failing 18
MAX_HOLD_EXPIRY_DAYS Maximum Holding days before expiring 7
SUPPRESSION_LIST_EXPIRY Suppression List expiry in days 30

DNS Settings

Parameter Description Default
DNS_HOSTNAME Domain Name Mail Server example.com
DNS_MX MX Record Hostnames - Seperate multiple with commas
DNS_SPF SPF Hostname spf.$DNS_HOSTNAME
DNS_RETURN_PATH Return path Hostname rp.$DNS_HOSTNAME
DNS_ROUTE_DOMAIN Routing Domain routes.$DNS_HOSTNAME
DNS_TRACK_DOMAIN Tracking Domain track.$DNS_HOSTNAME
DNS_DKIM_IDENTIFIER DKIM Identifier postal
DNS_DOMAIN_VERIFY_PREFIX Domain verification prefix postal-verification
DNS_RETURN_PATH_PREFIX Custom Return Path Prefix psrp

Security Settings

Parameter Description Default
ENABLE_FAIL2BAN Block hsots that repeatedly fail authentication TRUE
FAIL2BAN_LOG_FILE Log Location for Fail2ban /logs/fail2ban/fail2ban.log
FAIL2BAN_TIME_FIND Track failures for this time period 10m
FAIL2BAN_TIME_BAN Time to ban repeat offenders 10m
FAIL2BAN_MAX_RETRY Ban after how many tries during time period 5

Performance Settings

Parameter Description Default
WORKERS_AMOUNT Amount of Workers 1
WORKERS_THREADS Amount of Threads per worker 4

Logging Settings

Parameter Description Default
LOG_CONSOLE Log to Stdout Console true or false true
LOG_PATH Log Location /logs/
LOG_SIZE_MAX Maximum Log Size in KB 9999

Database Settings

Parameter Description Default
DB_HOST Hostname of MariaDB Container e.g. postal-db
DB_NAME Name of MariaDB Database e.g. postal
DB_USER Database Username e.g. postal
DB_PASS Password for Above User e.g. password
DB_PORT MariaDB Server Port 3306
DB_ROOT_PASS Needed for first boot - Assigns privileges to $DB_USER. This is your MariaDB Root Pass
RABBITMQ_HOST RabbitMQ Hostname or Container
RABBITMQ_VHOST RabbitMQ VHost shard
RABBITMQ_USER RabbitMQ Username
RABBITMQ_PASS RabbitMQ Password
RABBITMQ_PORT RabbitMQ Port 5672

Anti Spam Settings

Parameter Description Default
ENABLE_SPAMASSASSIN Enable Spamassassin true or false false
SPAMASSASSIN_HOST Hostname of Spamassassin daemon
SPAMASSASSIN_PORT TCP Port of spamassassin daemon 737
Parameter Description Default
ENABLE_RSPAMD Enable RSpamD checking true or false false
RSPAMD_FLAGS Flags to pass to rspamd daemon null
RSPAMD_HOST Hostname of rspamd daemon
RSPAMD_PASS RSpamd controller password null
RSPAMD_PORT TCP Port of rspamd daemon 11334
RSPAMD_SSL Use SSL for connecting to rspamd FALSE
Parameter Description Default
SPAM_THRESHOLD Amount to classify as Spam 5.0
SPAM_FAILURE_THRESHOLD Amount to fail as Spam 5.0

Anti Virus Settings

Parameter Description Default
ENABLE_CLAMAV Enable ClamAV true or false false
CLAMAV_HOST Hostname of Clamd Server
CLAMAV_PORT TCP Port of Clamd Server 3310

SMTP Settings

Client
Parameter Description Default
SMTP_CLIENT_OPEN_TIMEOUT Timeout for an Open Connection in seconds 30
SMTP_CLIENT_READ_TIMEOUT Timeout for Reading Data in seconds 60
Server
Parameter Description Default
SMTP_SERVER_ENABLE_TLS Enable TLS false
SMTP_SERVER_HELO_HOSTNAME What Hostname to send for HELO $DNS_HOSTNAME
SMTP_SERVER_LOG_CONNECTIONS Log SMTP Connections true
SMTP_SERVER_MAX_MESSAGE_SIZE Max message size in Megabytes 50
SMTP_SERVER_PORT Listening Port for Postal Main SMTP Server 25
SMTP_SERVER_PROXY_PROTOCOL Utilize Proxy Protocol false
SMTP_SERVER_SSL_VERSION SSL Versions SSLv23
SMTP_SERVER_STRIP_RECEIVED_HEADERS Strip Recieved Headers false
SMTP_SERVER_TLS_CERT TLS Cert Location (Will authgenerate if not exist) /certs/cert.pem
SMTP_SERVER_TLS_CIPHERS TLS Ciphers to use
SMTP_SERVER_TLS_KEY TLS Key Location (Will autogenerate if not exist) /certs/key.pem
Management System
Parameter Description Default
SMTP_FROM_ADDRESS From Address for Postam Management System [email protected]
SMTP_FROM_NAME From Name for Postal Management System Postal
SMTP_HOST SMTP Server to be used to send messages from Postal Management System to users 127.0.0.1
SMTP_PORT SMTP Port to be used to send messages from Postal Management System to Users 25
SMTP_USER Username to authenticate to SMTP Server
SMTP_PASS Password to authenticate to SMTP Server
Relay
Parameter Description Default
SMTP_RELAY_HOST Relay all outbound messages to this hostname
SMTP_RELAY_PORT SMTP Relay Port 25
SMTP_RELAY_SSL_MODE Relay SSL / TLS Mode Auto

Other Settings

Parameter Description Default
CONFIG_FILE Configuration File postal.yml
CONFIG_PATH Configuration Path /config/
FAST_SERVER_BIND_IP Bind IP for the Web Interface 0.0.0.0
FAST_SERVER_BIND_PORT_TLS Bind Port for the TLS Tracking Service 8443
FAST_SERVER_BIND_PORT Bind Port for the Tracking Server 8080
SETUP_TYPE Choose AUTO or MANUAL Setup type - Auto uses these environment variables AUTO
SIGNING_KEY_FILE Signing Key File signing.key
SIGNING_KEY_SIZE Signing Key Size 1024
WEB_BIND_IP Bind IP for the Web Interface 0.0.0.0
WEB_BIND_PORT Bind Port for the Web Interface 5000
WEB_HOSTNAME Hostname for Web Interface postal.example.com
WEB_MAX_THREADS Max Threads for Web Interface 5
WEB_PROTOCOL Protocol for Web Interface http or https http

Networking

Port Description
25 SMTP
80 Web Interface
8080 Fast Server /Tracking
8443 Fast Server / Tracking
5000 Puma`

Maintenance

Shell Access

For debugging and maintenance purposes you may want access the containers shell.

bash docker exec -it (whatever your container name is) bash

Support

These images were built to serve a specific need in a production environment and gradually have had more functionality added based on requests from the community.

Usage

  • The Discussions board is a great place for working with the community on tips and tricks of using this image.
  • Consider sponsoring me personalized support.

Bugfixes

  • Please, submit a Bug Report if something isn't working as expected. I'll do my best to issue a fix in short order.

Feature Requests

  • Feel free to submit a feature request, however there is no guarantee that it will be added, or at what timeline.
  • Consider sponsoring me regarding development of features.

Updates

  • Best effort to track upstream changes, More priority if I am actively using the image in a production environment.
  • Consider sponsoring me for up to date releases.

License

MIT. See LICENSE for more details.

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