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An email validator for Rails 3 and 4.
Branch: master

Merge pull request #30 from raventid/patch-1

updates ruby symbol syntax in
latest commit 738d73a2b3
@balexand authored

Build Status


Add to your Gemfile:

gem 'email_validator'


bundle install

Then add the following to your model:

validates :my_email_attribute, email: true

Strict mode

In order to have stricter validation (according to enable strict mode. You can do this globally by adding the following to your Gemfile:

gem 'email_validator', require: 'email_validator/strict'

Or you can do this in a specific validates call:

validates :my_email_attribute, email: {strict_mode: true}

Validation outside a model

If you need to validate an email outside a model, you can get the regexp :

Normal mode

EmailValidator.regexp # returns the regex
EmailValidator.valid?('') # boolean

Strict mode

EmailValidator.regexp(strict_mode: true)

Thread safety

This gem is thread safe, with one caveat: EmailValidator.default_options must be configured before use in a multi-threaded environment. If you configure default_options in a Rails initializer file, then you're good to go since initializers are run before worker threads are spawned.


Based on

Regular Expression based on tests.

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