There is documentation at hexdocs: http://hexdocs.pm/mail/

The project had its first commit yesterday. I wouldn't expect any sort of serious/reliable documentation until more of the project gets implemented.

The code uses elixirs built in doc system so you should be able to build docs after cloning the repo.

At a cursory glance it seems pretty reasonably well documented.

Yea it's ExDoc, think this should be helpful: http://elixir-lang.org/getting-started/mix-otp/docs-tests-an...

On mobile and on the run so can't confirm.

Absolutley agree with the lack of documentation. As a newbie on Elixir and Phoenix I wish it will improve over time.

I've got to strongly disagree with you on this. This library is a day old and there are already descriptions and examples on every public function. This is an example of the Elixir community's EXCELLENT documentation.