helder/mailcatcher repository overview

⁠docker-mailcatcher

Mailcatcher⁠ docker image to catch emails during development.

⁠Basic usage

There are two exposed ports. Use port 25 to send emails to, and 80 to access the web interface where your emails will be shown.

Run mailcatcher process:

docker run -d -p 1080:80 --name mail helder/mailcatcher

Link to another container to send emails:

docker run -it --link mail ...

In this example emails should be sent to host mail and port 25.

⁠Example with a PHP container and ssmtp

ssmtp is a very lightweight send-only sendmail emulator. Let's see an example of how we can override sendmail:

# Dockerfile
FROM helder/php

RUN apt-install ssmtp && \
    echo "sendmail_path = /usr/sbin/ssmtp -t" > /usr/local/etc/php/conf.d/sendmail.ini && \
    echo "mailhub=mail:25\nUseTLS=NO\nFromLineOverride=YES" > /etc/ssmtp/ssmtp.conf

Now test PHP's mail() function:

docker run -it --rm --link mail helder/php php -r 'mail("[email protected]", "Test", "Testing!", "From: [email protected]");'

Open your browser at http://localhost:1080⁠ to see your emails.