MailCatcher

https://hub.docker.com/r/iliadmitriev/mailcatcher

MailCatcher - is a ruby powered alpine image, based on https://mailcatcher.me. Its purpose is to provide a way of testing applications wich uses emails (i.e. sign in with email or email confirmation)

For amd64(x86_64) and arm64(aarch64)

Features

1. Simple SMTP server
2. WEB interface

Usage

Build

Build image from Dockerfile

docker build -t mailcatcher -f Dockerfile ./

Run

Create and run docker container from image

You need two tcp ports:

• 1080 - web interface port
• 1025 - smtp port

docker run -d -p 1080:1080 -p 1025:1025 --name mailcatcher mailcatcher

Test

curl \
    -F '=(;type=multipart/alternative' \
        -F '=<sample.txt;type=text/plain' \
        -F '=<sample.html;type=text/html' \
    -F '=)' \
    -F '=@sample.png;encoder=base64;headers="Content-ID: sample.png"' \
    --url 'smtp://localhost:1025' \
    -H "Subject: Test message of 3 parts" \
    --mail-from 'sender@example.com' \
    --mail-rcpt 'recipient@example.com'

Logs

docker logs -f mailcatcher

Web interface

Address http://localhost:1080/

• HTML - html view of email
• Plain text - plain text email alternative
• Source - source code of email
• Download - download email in eml format
• Clear - delete all emails

build multiplatform

1. create buildx context and set is as default

docker buildx create --use --name mybuild

2. build and push to repository

docker buildx build --platform linux/amd64,linux/arm64 \
 -t iliadmitriev/mailcatcher:latest --push ./

3. stop context and switch to default

docker buildx stop
docker buildx use default

GitHub Action https://github.com/docker/build-push-action/blob/master/docs/advanced/multi-platform.md