EmailDomainValidator

Email address's domain validator by checking presence of MX and A record.

Extra filters are available such as caching and whitelisting.

Add this line to your application's Gemfile:

gem 'email_domain_validator'

And then execute:

$ bundle

Or install it yourself as:

$ gem install email_domain_validator

Validate email:

v = EmailDomainValidator.new
v.valid?('saki@yahoo.co.jp')

Add cache filter

v.add_filter(:rails_cache, expires_in: 12.hours)
v.valid?('saki@yahoo.co.jp')
v.valid?('amy@yahoo.co.jp') # same domain will not be checked again

Always returns true. Useful for testing or development purposes.

v.add_filter(:dummy)

Use Rails' caching capability to cache lookup results. Options used in Rails caching such as :expires_in can be used here.

v.add_filter(:rails_cache, expires_in: 12.hours, race_condition_ttl: 1)

Declare a whitelist of domains which will always be considered valid.

v.add_filter(:whitelist, ['yahoo.com.tw', 'gmail.com'])

1. Fork it ( https://github.com/lulalala/email_domain_validator/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request