Forum: Ruby on Rails Mailer failure: ArgumentError: A sender (Return-Path, Sender or From) required to send a message

On Tue, Aug 16, 2011 at 1:38 PM, 7stud -- <lists@ruby-forum.com> wrote:

> Thanks... actually I just honed in on the next line starting with @url...
This is where it is failing. Turns out it was that I was missing the 
default
app host in my development.rb file. What wasted all this time is that 
the
error message seemingly was not the cause of the problem or even 
accurate...
I know better now but usually ruby/rails messages are more accurate.