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$sudo script/generate mailer AppNotifier signup

This will add a signup email notifier to your app. Then next step is just to do a little configuration to make it work, and how you want it to work.

In config/environment.rb , let’s add the mailer base so that your app will know which engine to send email out (normally it’s smtp setting)

Here’s if you use stmp server to send mail out: (put this stuff at the bottom of the file environment.rb)

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# Use this mailer to send Mail
ActionMailer::Base.delivery_method = :smtp
ActionMailer::Base.server_settings = {
:address => "mysmtp.server.com",
:port => 25,
:domain => "appdoamin.com",
:authentication => :login,
:user_name => "smtp_usr",
:password => "secret",
}

But if your server is using sendmail function (mostly in Linux)

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ActionMailer::Base.delivery_method = :sendmail
ActionMailer::Base.sendmail_settings = {
:location => '/usr/sbin/sendmail',
:arguments => '-i -t'}

If your server do not have sendmail, you can do it:

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$sudo apt-get install sendmail