Ruby on Rails - Not receiving 'Welcome Email' in Production

Question

I'm attempting to send a welcome email when a new user is created via Action Mailer. I've followed the guide here: https://guides.rubyonrails.org/action_mailer_basics.html

The email is successful when creating a user on localhost:3000, but when I deploy and test in production environment (Heroku), no success.

Even worse, I'm not seeing errors in the Heroku logs.

I'm not really sure what to check at this point. I've tried moving everything to my application.rb file since the configuration is the same (see: ActionMailer doesn't work in production)

I thought that it may be sending a delayed message, but I've already tried UserMailer.with(user: @user).welcome_email.deliver_later as well as deliver_now

config/application.rb

config.action_mailer.delivery_method = :smtp
    config.action_mailer.smtp_settings = {
      address:              'smtp.gmail.com',
      port:                 587,
      domain:               'gmail.com',
      user_name:            ENV["GMAIL_USERNAME"],
      password:             ENV["GMAIL_PASSWORD"],
      authentication:       'plain',
      enable_starttls_auto: true }

config/environments/production.rb

config.action_mailer.raise_delivery_errors = false
config.action_mailer.perform_caching = false

mailers/user_mailer

class UserMailer < ApplicationMailer
  default from: '[email protected]'

  def welcome_email
    @user = params[:user]
    @url  = 'https://pickleballsocial.herokuapp.com'
    mail(to: @user.email, subject: 'Welcome Pickleball Social')
  end
end

users_controller

def create
    @user = User.new(user_params)

    respond_to do |format|
      if @user.save
        session[:user_id] = @user.id
        # Tell the UserMailer to send a welcome email after save
        UserMailer.with(user: @user).welcome_email.deliver_later

        format.html { redirect_to(@user, notice: 'User was successfully created.') }
        format.json { render json: @user, status: :created, location: @user }

        #redirect_to user_path(@user)
      else
        format.html { render action: 'new' }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end

I assume you've confirmed the user name and password from ENV is the same as what you tested on localhost? — lurker

FullMetalEngineer FullMetalEngineer · Accepted Answer · 2019-06-09T16:45:49

I don't see any major issues with your code. First thing I'd check is to make sure the credentials are correct. If that's not the issue, without log information, I'm not sure of the problem.