Unrecognized authentication type when doing an Auth to Exchange from Rails

Question

I\'m getting this error when trying to authenticate with Exchange Server from Ruby on Rails:

504 5.7.4 Unrecognized authentication type

Answer 1

The below is from link:

Rails and Exchange Email Auth

1) Add the ruby-ntlm gem to your Gemfile and run bundle install.

2) Add the NTLM SMTP library to your config/environment.rb file.

# Load the rails application
  require File.expand_path('../application', __FILE__)
  require 'ntlm/smtp'
# Initialize the rails application
  RailsApp::Application.initialize! 

3) Set up your environment file to authenticate with NTLM.

config.active_support.deprecation = :notify
config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
 :address => '<your-email-server>',
 :domain => '<your-domain>',
 :user_name => '<your-username>',
 :password => '<your-unencrypted-password>',
 :port => 25,
 :authentication => :ntlm

****replace values with you own***