Override e-mail recipients in ActionMailer

The ActionMailer in Rails 2 depends on a buggy version of TMail, which sometimes inserts a blank line into the mail header when sending a mail to multiple recipients. This makes the header end prematurely.

The re...

This might eventually be fixed by Rails itself.\
Right now this is the way to have the rails_xss plugin not escape the body of ActionMailer mails.

Put this into config/initializers/mailers_without_rails_xss.rb:

popthis is awesome when used with inaction_mailer.

Setup inaction_mailer

Install the gem:
sudo...

When using ActionMailer, you can set an array of email addresses as recipients. If this array is generated by e.g. collecting email addresses from the database, it might sometimes be empty.

To prevent ActionMailer to deliver mails to nobody, si...

You can use mail-tester.com to check your application's e-mails for issues that might cause e-mails to be classified as spam.

They provide a one-time e-mail addresses that you can use to sign up etc. You can then c...

If your rails application is unable to send mails, it might be useful to debug your settings using the rails console. Here is a snippet that shows the current settings and lets you send a test mail directly from the console:

mailer = Acti...

When building an application that sends e-mails to users, you want to avoid those e-mails from being classified as spam. Most obvious scoring issues will not be relevant to you because you are not a spammer.

However, your application must do one ...

In Rails, we usually have a mailer setup like this:

class MyMailer < ActionMailer::Base

  def newsletter
    mail to: 'receiver@host.tld',
      from: 'sender@host.tld',
      subject: 'My mail'
  end

end

If you want to preview you...

When changing code in mailers, updating the corresponding mailer preview can be forgotten very easily.

Mailer previews can be tested like other code as well and I sometimes add the following tests to test suites:

# Ma...

The Truemail gem (not to be confused with truemail.io) allows validating email addresses, e.g. when users enter them into a sign-up form. It runs inside your application and does not depend on an external...