How to send emails with multiple, dynamic smtp using Actionmailer/Ruby on Rails

Question

I saw this post but mine is slightly different:

Rails ActionMailer with multiple SMTP servers

I am allowing the users to send mail using their own SMTP crede

Answer 1

For Rails 3.2.x

You can include AbstractController::Callbacks in your mailer class and the do a "after_filter :set_delivery_options" inside the mailer.

The set_delivery_options method would have access to instance variables setup by you in your mailer action and you can access the mail object as "message".

class MyNailer < ActionMailer::Base
  include AbstractController::Callbacks
  after_filter :set_delivery_options

  def nail_it(user)
    @user = user
    mail :subject => "you nailed it"
  end

  private

  def set_delivery_options
    message.delivery_method.settings.merge!(@user.company.smtp_creds)
  end
end