It validates email for application use (registering a new account for example)


In your Gemfile :

gem 'valid_email'

In your code :

require 'valid_email'
class Person
  include ActiveModel::Validations
  attr_accessor :name, :email

  validates :name, :presence => true, :length => { :maximum => 100 }
  validates :email, :presence => true, :email => true

p = Person.new
p.name = "hallelujah"
p.email = "[email protected]"
p.valid? # => true

p.email = "[email protected]"
p.valid? # => false

p.email = "John Does <[email protected]>"
p.valid? # => false

You can check if email domain has MX record:

validates :email, :email => {:mx => true, :message => I18n.t('validations.errors.models.user.invalid_email')}


validates :email, :email => {:message => I18n.t('validations.errors.models.user.invalid_email')}, :mx => {:message => I18n.t('validations.errors.models.user.invalid_mx')}

By default, the email domain is validated using a regular expression, which does not require an external service and improves performance. Alternatively, you can check if an email domain has a MX or A record by using :mx_with_fallback instead of :mx.

validates :email, :email => {:mx_with_fallback => true}

You can detect disposable accounts

validates :email, :email => {:ban_disposable_email => true, :message => I18n.t('validations.errors.models.user.invalid_email')}

If you don't want the MX validator stuff, just require the right file

require 'valid_email/email_validator'

Or in your Gemfile

gem 'valid_email', :require => 'valid_email/email_validator'

Usage outside of model validation

There is a chance that you want to use e-mail validator outside of model validation.
If that's the case, you can use the following methods:

ValidateEmail.valid?('[email protected]') # You can optionally pass a hash of options, same as validator
ValidateEmail.mx_valid?('[email protected]')
ValidateEmail.mx_valid_with_fallback?('[email protected]')
ValidateEmail.valid?('[email protected]')

Load it (and not the rails extensions) with

gem 'valid_email', require: 'valid_email/validate_email'

String and Nil object extensions

There is also a String and Nil class extension, if you require the gem in this way in Gemfile:

gem 'valid_email', require: ['valid_email/all_with_extensions']

You will be able to use the following methods:

nil.email? # => false
"[email protected]".email? # => May return true if it exists. It accepts a hash of options like ValidateEmail.valid?

Code Status

  • Build Status


  • Ramihajamalala Hery hery[at]rails-royce.org
  • Fire-Dragon-DoL francesco.belladonna[at]gmail.com
  • dush dusanek[at]iquest.cz
  • MIke Carter mike[at]mcarter.me
  • Heng heng[at]reamaze.com
  • Marco Perrando mperrando[at]soluzioninrete.it
  • Jörg Thalheim joerg[at]higgsboson.tk
  • Andrey Deryabin deriabin[at]gmail.com
  • Nicholas Rutherford nick.rutherford[at]gmail.com
  • Oleg Shur workshur[at]gmail.com
  • Joel Chippindale joel[at]joelchippindale.com
  • Sami Haahtinen sami[at]haahtinen.name
  • Jean Boussier jean.boussier[at]gmail.com

Note on Patches/Pull Requests

  • Fork the project.

  • Make your feature addition or bug fix.

  • Add tests for it. This is important so I don’t break it in a future version unintentionally.

  • Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)

  • Send me a pull request. Bonus points for topic branches.


Copyright © 2011 Ramihajamalala Hery. See LICENSE for details