Update mail dependency to version 2.4.3
Update mail dependency to version 2.4.3

arrogantgamer/ludum_dare_28,sferik/sign-in-with-twitter,ksmetana/rails-app-twitter-test,ksmetana/rails-app-twitter-test,sferik/sign-in-with-twitter,arrogantgamer/ludum_dare_28,theonlyjames/garbage,theonlyjames/garbage,sferik/sign-in-with-twitter