ActionMailer 2.3.8 is sending all of my mail in HTML format, regardless of what I do

I'm have a Rails 2.3.8 app, with a notifier in app/models/hello_notifier.rb that looks like this:

class HelloNotifier < ActionMailer::Base
    def hello_world
        @recipients = 'to@email.address'
        @from = 'from@email@address'
        @subject = 'Hello world'
    end
end

And a view in app/views/hello_notifier/hello_world.erb that looks like this:

Hello
World

Not when I run HelloNotifier.deliver_hello_world, it delivers the email, but it delivers it as a multipart email with plain and html variations.

I've tried adding @content_type = 'text/plain' to my notifier model as well as content_type 'text/plain'. I've also tried adding ActionMailer::Base.default_content_type 开发者_开发知识库= 'text/plain' to my actionmailer initializer. I've also tried renaming my view to hello_world.text.plain.erb. Nothing I try seems to help. It's always sending my email as a multipart html/text email.

Any ideas on how to force it to send as 'text/plain'?

---

Try to rename your view to hello_world.text.erb

---

Rails 2.3.8 searches template with .erb extension with default content type text/plain.
Try to rename your file name to hello_world.erb

---

In Rails 2, you implicitly specify the content type of your email template by giving it one of the following file extensions:

• .text.plain.erb for plain text emails
• .text.html.erb for HTML emails

For example, "your_email_template.text.plain.erb" for plain text and "your_email_template.text.html.erb" for HTML.

See also: http://guides.rubyonrails.org/v2.3.8/action_mailer_basics.html