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Using mail_form gem and Sendgrid - having an issue

Kyle Williamson asked in Rails

I'm trying to test sending an email from the page, but I'm not receiving any emails in my inbox. While in the rails console, it looks like the email is sent correctly. I'm just not getting it. I believe I have all the necessary code. I'm following this tutorial as I'm working on my personal web portfolio and I'm making a contact form that will email me directly from the page. Here's the link to the tutorial just in case it's needed:

I will post my code here as well. I'll try to get the necessary files in.


<h1 class="page_title">Say hello!</h1>

  <div class="skinny_wrapper wrapper_padding">
    <%= form_for @contact do |f| %>
      <%= f.label :name %><br>
      <%= f.text_field :name, required: true %>


      <%= f.label :email %><br>
      <%= f.text_field :email, required: true %>


      <%= f.label :message %><br>
      <%= f.text_area :message, as: :text %>

      <div class="hidden">
        <%= f.label :nicname %><br>
        <%= f.text_field :nickname, hint: 'Leave this field blank' %>

      <%= f.submit 'Send Message', class: "button" %>

    <% end %>

Contacts controller:

class ContactsController < ApplicationController
  def new
    @contact =

  def create
    @contact ={params[:contact]}
    @contact.request = request
    if @contact.deliver[:error] = nil
    else[:error] = 'Cannot send message.'
      render :new

Contact Model (not generated)

class Contact < MailForm::Base
  attribute :name,      :validate => true
  attribute :email,     :validate => /\A([\w\.%\+\-]+)@([\w\-]+\.)+([\w]{2,})\z/i
  attribute :file,      :attachment => true

  attribute :message
  attribute :nickname,  :captcha  => true

  def headers
      :subject => "Contact Form",
      :to => "",
      :from => %("#{name}" <#{email}>)

And just in case, the production.rb file:

Rails.application.configure do
  # Settings specified here will take precedence over those in config/application.rb.

  # Code is not reloaded between requests.
  config.cache_classes = true

  # Eager load code on boot. This eager loads most of Rails and
  # your application in memory, allowing both threaded web servers
  # and those relying on copy on write to perform better.
  # Rake tasks automatically ignore this option for performance.
  config.eager_load = true

  # Full error reports are disabled and caching is turned on.
  config.consider_all_requests_local       = false
  config.action_controller.perform_caching = true

  # Ensures that a master key has been made available in either ENV["RAILS_MASTER_KEY"]
  # or in config/master.key. This key is used to decrypt credentials (and other encrypted files).
  # config.require_master_key = true

  # Disable serving static files from the `/public` folder by default since
  # Apache or NGINX already handles this.
  config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?

  # Compress JavaScripts and CSS.
  config.assets.js_compressor = :uglifier
  # config.assets.css_compressor = :sass

  # Do not fallback to assets pipeline if a precompiled asset is missed.
  config.serve_static_assets = true
  config.assets.compile = true

  # `config.assets.precompile` and `config.assets.version` have moved to config/initializers/assets.rb

  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
  # config.action_controller.asset_host = ''

  # Specifies the header that your server uses for sending files.
  # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX

  # Store uploaded files on the local file system (see config/storage.yml for options)
  config.active_storage.service = :local

  # Mount Action Cable outside main process or domain
  # config.action_cable.mount_path = nil
  # config.action_cable.url = 'wss://'
  # config.action_cable.allowed_request_origins = [ '', /http:\/\/example.*/ ]

  # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
  # config.force_ssl = true

  # Use the lowest log level to ensure availability of diagnostic information
  # when problems arise.
  config.log_level = :debug

  # Prepend all log lines with the following tags.
  config.log_tags = [ :request_id ]

  # Use a different cache store in production.
  # config.cache_store = :mem_cache_store

  # Use a real queuing backend for Active Job (and separate queues per environment)
  # config.active_job.queue_adapter     = :resque
  # config.active_job.queue_name_prefix = "portfolio-site_#{Rails.env}"

  config.action_mailer.perform_caching = false

  # Ignore bad email addresses and do not raise email delivery errors.
  # Set this to true and configure the email server for immediate delivery to raise delivery errors.
  # config.action_mailer.raise_delivery_errors = false

  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
  # the I18n.default_locale when a translation cannot be found).
  config.i18n.fallbacks = true

  # Send deprecation notices to registered listeners.
  config.active_support.deprecation = :notify

  # Use default logging formatter so that PID and timestamp are not suppressed.
  config.log_formatter =

  # Use a different logger for distributed setups.
  # require 'syslog/logger'
  # config.logger = 'app-name')

  if ENV["RAILS_LOG_TO_STDOUT"].present?
    logger           =
    logger.formatter = config.log_formatter
    config.logger    =

  # Do not dump schema after migrations.
  config.active_record.dump_schema_after_migration = false

  config.action_mailer.default_url_options =  { host: '' }
  config.action_mailer.delivery_method = :smtp 

  ActionMailer::Base.smtp_settings = {
    :address        => '',
    :porr           => '587',
    :authentication => :plain,
    :user_name      => ENV['SENDGRID_USERNAME'],
    :password       => ENV['SENDGRID_PASSWORD'],
    :domain         => '',
    :enable_starttls_auto => true

Thank you in advance.

I was experiencing something similar after following a mail_form tutorial. In my case, the email wasn't being sent through due to DMARC and spam prevention practices from Sendgrid (and settings I setup to help thwart spammers). So, this is actually good behavior but I still want the email to be sent.

I solved this by changing this :from => %("#{name}" <#{email}>) to :from => "email@myallowedemailingdomain". I then added an interpolation to the subject line to give a little clarity on who the email is from before opening it.

For example, :subject => "Contact Form #{name}".

So, about three steps:

1) Setup an email address to send yourself emails from your domain (
2) Change :from => %("#{name}" <#{email}>) to :from => ""
3) Optional: add string interpolation to your subject header portion for more info (:subject => "Contact Form #{name} | My Website").

Hope this helps.

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