Sending mails automatically through action mailer Rails 3.1 - ruby-on-rails-3.1

Question

I have to send weekly emails to all the user about the latest things happening. I am using ActionMailer to accomplish other mailing task however I have no clue how to automate the weekly emails.
Update
I found whenever gem which could be used to schedule cron jobs. I guess this could be used to send weekly emails which I intend to. Still looking how to make it work with ActionMailer will update once I find the solution
Update 2
This is what I have done so far using whenever gem:-
in schedule.rb
every 1.minute do
runner "User.weekly_update", :environment => 'development'
end
in users_mailer.rb
def weekly_mail(email)
mail(:to => email, :subject => "Weekly email from footyaddicts")
end
in users.rb
def self.weekly_update
#user = User.all
#user.each do |u|
UsersMailer.weekly_mail(u.email).deliver
end
end
If i try to run User.weekly_update from the console I am able to get the mails. I am testing in development mode and using rvm. I checked my crontab file and it has got the right stuff.
However I am not getting any mails automatically from the app. Any clue what might be wrong?
Thanks,

Answer 1

OK so it turns out to be a path issue with whenever gem, and the problem was created when I installed another version of ruby.
In my machine the new ruby version is installed in /usr/local/bin/ruby. In my rails app I had to go to the file script/rails and replace #!/usr/bin/env ruby with #!/usr/local/bin/ruby.
I found this out by visiting cron.log file which showed this error message :- /usr/bin/env: ruby: No such file or directory
I made a cron.log file to log the cron error this is what I did in my schedule.rb code written in the question :-
every 2.minutes do
runner "User.weekly_update", :environment => 'development', :output => 'log/cron.log'
end
I am getting periodic mails now.

Answer 2

It seems like you haven't configured ActionMailer settings.
First check out the logs from console, whether the mailing process is working(paste your logs).
If yes then do following steps.
add this in your gemfile.
gem 'tlsmail'
run
bundle install
write these configuration setting in your config/environments/development.rb file
require 'tlsmail'
Net::SMTP.enable_tls(OpenSSL::SSL::VERIFY_NONE)
ActionMailer::Base.delivery_method = :smtp
ActionMailer::Base.perform_deliveries = true
ActionMailer::Base.raise_delivery_errors = true
ActionMailer::Base.smtp_settings = {
:address => "smtp.gmail.com",
:port => "587",
:domain => "gmail.com",
:enable_starttls_auto => true,
:authentication => :login,
:user_name => "<address>#gmail.com",
:password => "<password>"
}
config.action_mailer.raise_delivery_errors = true
add your working password/email against user_name and password.
Don't forget to restart server.