devise

https://github.com/plataformatec/devise

Ruby

Flexible authentication solution for Rails with Warden.

Mail::Header.maximum_amount

Large amount of headers in Email might create extra high CPU load
Use this parameter to limit number of headers that will be parsed by 
mail library.
Default: 1000

Source | Google | Stack overflow

Edit

git clone [email protected]:plataformatec/devise.git
cd devise
open

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Mail--Header-maximum_amount-for-pr

# Commit to git

git add git commit -m "better docs for Mail::Header.maximum_amount"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-Mail--Header-maximum_amount-for-pr

hub pull-request

# Celebrate!