action mailer error to deliver email - ruby-on-rails

Question

I am trying implementing send mail through action mailer in rails related code are..
my mailers/user_mailer.rb
class UserMailer < ActionMailer::Base
default :from => "debasish#thejaingroup.com"
def registration_confirmation(user)
mail(:to=>user.email, :subject =>"Registered")
end
end
users.controller is
def create
#user = User.new(user_params)
respond_to do |format|
if #user.save
UserMailer.registration_confirmation(#user).deliver
format.html { redirect_to #user, notice: 'User was successfully created.' }
format.json { render :show, status: :created, location: #user }
else
format.html { render :new }
format.json { render json: #user.errors, status: :unprocessable_entity }
end
end
end
Here, Your initializer\setup_mail.rb setting will go to the development.rb
config.action_mailer.default_url_options = { host: 'localhost', port: 9292 }
config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
:address =>"smtp.thejaingroup.com",
:domain =>"thejaingroup.com",
:port => 587,
:user_name =>"debasish#thejaingroup.com",
:password =>"************"
:authentication =>"plain"
}
and my view is .. user_registration.text.erb ---is
Hi sir you successfully Completed signed..........!
my have a error msg after running this apps..
SocketError in UsersController#create
getaddrinfo: The requested name is valid, but no data of the requested type was found.

Answer 1

I don't think the address you've used here 'smtp.thejaingroup.com' is the address of the valid email service provider. If you are trying to use your gmail, then it should be 'smtp.gmail.com'.
This is the normal gmail configuration.
config.action_mailer.smtp_settings = {
:address => "smtp.gmail.com",
:port => 587,
:user_name => ENV['gmail_username'],
:password => ENV['gmail_password'],
:authentication => "plain",
:enable_starttls_auto => true
}
In this case, all the mails would be delivered to your gmail. . If you don't want this to happen, you can try the gem letter_opener for development environment. For production env, you may have to use email provider such as mandrill or sendgrid.