rails/rails — pull request #15573 by bf4 (2014-06-08 15:09:22+00:00)
Title: Mail 2.6.1 silences excessive warnings; remove Gemfile hack

Completes https://github.com/rails/rails/pull/15493

Revert "For our build, stick with mail 2.5.x for now"

This reverts commit b8f586a094c104006d29a87fee0d8b48d0af2d14.