Rails ActionMailer with multiple SMTP servers
actionmailer, ruby-on-rails, smtp
Solution
class UserMailer < ActionMailer::Base
def welcome_email(user, company)
@user = user
@url = user_url(@user)
delivery_options = { user_name: company.smtp_user,
password: company.smtp_password,
address: company.smtp_host }
mail(to: @user.email,
subject: "Please see the Terms and Conditions attached",
delivery_method_options: delivery_options)
end
end
Rails 4 allows for dynamic delivery options. The above code is straight from the action mailer basics guide, which you can find here: http://guides.rubyonrails.org/v4.0/action_mailer_basics.html#sending-emails-with-dynamic-delivery-options
With this, it is possible to have different smtp settings for every email you send, or, like in your use case for different sub classes like UserMailer, OtherMailer etc.
Problem
I have a need to use two different smtp servers in a Rails application. It appears that the way ActionMailer is constructed, it is not possible to have different smtp_settings for a subclass. I could reload the smtp settings for each mailer class whenever a message is being sent, but that messes up the ExceptionNotifier plugin which is outside my control (unless I mess with it too). Does anyone have a solution/plugin for something like this? Ideally I would like to have ``` class UserMailer < ActionMailer::Base; end ``` and then set in environment.rb ``` ActionMailer::Base.smtp_settings = standard_smtp_settings UserMailer.smtp_settings = user_smtp_settings ``` Thus, most of my mailers including ExceptionNotifier would pickup the default settings, but the UserMailer would use a paid relay service.