How get mail_url

mail_url is a method in Ruby on Rails that generates a URL for sending emails. Here are a few ways to get the mail_url:

1. Using the mail_url method in a controller or view:

   <%= mail_url %>

   This will generate the URL for the default email settings in your Rails application.

2. Using the mail_url method with options:

   <%= mail_url(:host => 'example.com', :port => 587, :user_name => 'user', :password => 'password') %>

   This will generate a URL with custom email settings.

3. Using the ActionMailer::Base.default_url_options method:

   ActionMailer::Base.default_url_options[:host]
   ActionMailer::Base.default_url_options[:port]
   ActionMailer::Base.default_url_options[:user_name]
   ActionMailer::Base.default_url_options[:password]

   This will give you the default email settings for your Rails application.

4. Using the Rails.application.config.action_mailer.default_url_options method:

   Rails.application.config.action_mailer.default_url_options[:host]
   Rails.application.config.action_mailer.default_url_options[:port]
   Rails.application.config.action_mailer.default_url_options[:user_name]
   Rails.application.config.action_mailer.default_url_options[:password]

   This will also give you the default email settings for your Rails application.

Note that mail_url is only available in Rails 3.1 and later versions. In earlier versions of Rails, you can use ActionMailer::Base.smtp_settings[:url] to get the email URL.