Installing MailCatcher is straightforward. It can be installed using RubyGems, a package manager for Ruby. First, ensure you have Ruby installed on your system. Then, you can install MailCatcher by running the following command: gem install mailcatcher Once installed, you can start MailCatcher by simply running: mailcatcher By default, MailCatcher runs a web server on http://127.0.0.1:1080, where you can view the captured emails.