Easy TestMailer for verifying SMTP settings via rails console

test_mailer.rb

# You can either paste all of the code below directly into a rails console session (if you only plan on needing to test 
# this once or twice), or put the TestMailer class in a directory that would get autoloaded so that you can use it via 
# line 17 at will.

class TestMailer < ApplicationMailer
  def send_email
    mail(
      to: "ex@mple.com", 
      subject: "test smtp service", 
      body: "this is a test", 
      content_type: "text/html", 
      from: "test@dev.com",
    )
  end
end

TestMailer.send_email.deliver_now