How to catch error exception in ActionMailer

Question

The problem is how can I catch exception in delivering mail by ActionMailer. For me it sounds impossible, because in this case ActionMailer should sent mail to mailserver, a

Answer 1

This is inspired by the answer given by @sukeerthi-adiga

class ApplicationMailer < ActionMailer::Base
  # Add other exceptions you want rescued in the array below
  ERRORS_TO_RESCUE = [
    Net::SMTPAuthenticationError,
    Net::SMTPServerBusy,
    Net::SMTPSyntaxError,
    Net::SMTPFatalError,
    Net::SMTPUnknownError,
    Errno::ECONNREFUSED
  ]

  rescue_from *ERRORS_TO_RESCUE do |exception|
    # Handle it here
    Rails.logger.error("failed to send email")
  end

end

The * is the splat operator. It expands an Array into a list of arguments.

More explanation about (*) splat operator