Validate emails with the help of the mail
gem instead of some clunky regexp.
Aditionally validate that the domain has a MX record.
Optionally validate against a static list of disposable email services.
Optionally validate that the email is not subaddressed (RFC5233).
There are lots of other gems and libraries that validates email addresses but most of them use some clunky regexp. I also saw a need to be able to validate that the email address is not coming from a "disposable email" provider.
Yes, it is used in several production apps.
Add this line to your application's Gemfile:
gem "valid_email2"
And then execute:
$ bundle
Or install it yourself as:
$ gem install valid_email2
If you just want to validate that it is a valid email address:
class User < ActiveRecord::Base
validates :email, presence: true, 'valid_email_2/email': true
end
To validate that the domain has an MX record or A record:
validates :email, 'valid_email_2/email': { mx: true }
To validate strictly that the domain has an MX record:
validates :email, 'valid_email_2/email': { strict_mx: true }
strict_mx
and mx
both default to a 5 second timeout for DNS lookups.
To override this timeout, specify a dns_timeout
option:
validates :email, 'valid_email_2/email': { strict_mx: true, dns_timeout: 10 }
Any checks that require DNS resolution will use the default Resolv::DNS
nameservers for DNS lookups.
To override these, specify a dns_nameserver
option:
validates :email, 'valid_email_2/email': { mx: true, dns_nameserver: ['8.8.8.8', '8.8.4.4'] }
To validate that the domain is not a disposable email (checks domain and MX server):
validates :email, 'valid_email_2/email': { disposable: true }
To validate that the domain is not a disposable email (checks domain only, does not check MX server):
validates :email, 'valid_email_2/email': { disposable_domain: true }
To validate that the domain is not a disposable email or a disposable email (checks domain and MX server) but whitelisted (under config/whitelisted_email_domains.yml):
validates :email, 'valid_email_2/email': { disposable_with_whitelist: true }
To validate that the domain is not a disposable email or a disposable email (checks domain only, does not check MX server) but whitelisted (under config/whitelisted_email_domains.yml):
validates :email, 'valid_email_2/email': { disposable_domain_with_whitelist: true }
To validate that the domain is not blacklisted (under config/blacklisted_email_domains.yml):
validates :email, 'valid_email_2/email': { blacklist: true }
To validate that email is not subaddressed:
validates :email, 'valid_email_2/email': { disallow_subaddressing: true }
To validate that email does not contain a dot anywhere before the @:
validates :email, 'valid_email_2/email': { disallow_dotted: true }
To validate create your own custom message:
validates :email, 'valid_email_2/email': { message: "is not a valid email" }
To allow multiple addresses separated by comma:
validates :email, 'valid_email_2/email': { multiple: true }
All together:
validates :email, 'valid_email_2/email': { mx: true, disposable: true, disallow_subaddressing: true}
Note that this gem will let an empty email pass through so you will need to add
presence: true
if you require an email
address = ValidEmail2::Address.new("lisinge@gmail.com")
address.valid? => true
address.disposable? => false
address.valid_mx? => true
address.valid_strict_mx? => true
address.subaddressed? => false
If you are validating mx
then your specs will fail without an internet connection.
It is a good idea to stub out that validation in your test environment.
Do so by adding this in your spec_helper
:
config.before(:each) do
allow_any_instance_of(ValidEmail2::Address).to receive_messages(
valid_mx?: true,
valid_strict_mx?: true,
mx_server_is_in?: false
)
end
This gem is tested against currently supported Ruby and Rails versions. For an up to date list, check the build matrix in the workflow.
In version v3.0.0 I decided to move and rename the config files from the vendor directory to the config directory. That means:
vendor/blacklist.yml
-> config/blacklisted_email_domains.yml
vendor/whitelist.yml
-> config/whitelisted_email_domains.yml
The disposable
validation has been improved with a mx
check. Apply the
stub, as noted in the Test environment section, if your tests have slowed
down or if they do not work without an internet connection.
In version 1.0 of valid_email2 we only defined the email
validator.
But since other gems also define a email
validator this can cause some unintended
behaviours and emails that shouldn't be valid are regarded valid because the
wrong validator is used by rails.
So in version 2.0 we decided to deprecate using the email
validator directly
and instead define a valid_email_2/email
validator to be sure that the correct
validator gets used.
So this:
validates :email, email: { mx: true, disposable: true }
Becomes this:
validates :email, 'valid_email_2/email': { mx: true, disposable: true }
git checkout -b my-new-feature
)git commit -am 'Add some feature'
)git push origin my-new-feature
)