Rails Cookbook (Cookbooks (OReilly))

Problem

Contributed by: Dae San Hwang

You want to configure your Rails application to send email messages.

Solution

Add the following code to config/environment.rb:

ActionMailer::Base.server_settings = { :address => "mail.yourhostingcompany.com", :port => 25, :domain => "www.yourwebsite.com", :authentication => :login, :user_name => "username", :password => "password" }

Replace each hash value with proper settings for your Simple Mail Transfer Protocol (SMTP) server.

You may also change the default email message format. If you prefer to send email in HTML instead of plain text format, add the following line to config/environment.rb as well:

ActionMailer::Base.default_content_type = "text/html"

Possible values for ActionMailer::Base.default_content_type are "text/plain", "text/html", and "text/enriched". The default value is "text/plain".

Discussion

ActionMailer::Base.server_settings is a hash object containing configuration parameters to connect to the SMTP server. Here's what each parameter does:

:address

Address of your SMTP server.

:port

Port number of your SMTP server. The default port number for SMTP is 25.

:domain

Domain name used to identify your server to the SMTP server. You should use the domain name for the server sending the email to reduce the chance of your email being rejected as spam.

:authentication

This may be nil, :plain, :login, or :cram_md5. The authentication value you choose here must match the authentication method expected by your SMTP server. If your SMTP server does not require authentication, set this value to nil.

:user_name , :password

Username and password to authenticate to the SMTP server. Required when :authentication is set to :plain, :login, or :cram_md5. If :authentication is set to nil, then these values should be set to nil as well.

Action Mailer does not support SMTP over TLS or SSL as of version 1.2.1.

See Also

  • The Action Mailer documentation, http://api.rubyonrails.org/classes/ActionMailer/Base.html

  • Wikipedia reference for SMTP, http://en.wikipedia.org/wiki/Smtp

  • Section 9.2"

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