Add simple_format to your list of dependencies in mix.exs: elixir def deps do [{:simple_format, "~> 0.1"}] end Ensure simple_format is started before your application: elixir def application do ...

A simple HTML web form. Check out the live demo here. Please note that the demo form intentionally give out 405 errors. This is to prevent email spamming. It works if you host it on a standard host, ...

In the fourth parameter make sure to set the variable IsHtml to true, otherwise all the HTML formatting will not work and the tags will be visible. The possibilities are endless with HTML reporting.