add fake mail validation

Gemfile

@@ -66,6 +66,8 @@ gem 'tumblr_client'
 gem 'foreman'
 gem 'redis'
 
+gem 'fake_email_validator'
+
 group :development do
   # require spring 1.3.5 since shit's on fire on my local instance with 1.3.4 (Gem::LoadError)
   gem 'spring', '~> 1.3.5'

Gemfile.lock

@@ -115,6 +115,9 @@ GEM
     factory_girl_rails (4.5.0)
       factory_girl (~> 4.5.0)
       railties (>= 3.0.0)
+    fake_email_validator (1.0.11)
+      activemodel
+      mail
     faker (1.4.3)
       i18n (~> 0.5)
     faraday (0.9.1)
@@ -496,6 +499,7 @@ DEPENDENCIES
   devise-async
   devise-i18n
   factory_girl_rails
+  fake_email_validator
   faker
   fog
   fog-aws

app/models/user.rb

@@ -38,6 +38,7 @@ class User < ActiveRecord::Base
     screen_name.strip!
   end
 
+  validates :email, fake_email: true
   validates :screen_name, presence: true, format: { with: SCREEN_NAME_REGEX }, uniqueness: { case_sensitive: false }, screen_name: true
 
   validates :display_name, length: { maximum: 50 }