Question

The following code seems to work if there is one user, but truncate the email for multiple users:

users.each do |user|
  mail(
    :to => user.email,
    :subject => 'Hi',
    :template_name => 'notification'
  ).deliver

Is this the proper way to send a few emails?

• Ruby on Rails 3.2.2
• Heroku
• SendGrid

Answer 1

It seems that the problem is that each instance of the Mailer can only send one email. Perhaps the mail object is falling out of scope and getting cleaned up by the garbage collector…

The solution that worked was to iterate over the users outside of the Mailer, and call it once for each user. It may be slow but it should happen in the background anyway so it’s fine.