README.md

emailValidator

Validate and check for disposable/temporary/throw away emails.

Installation

Require this package with Composer in the root directory of your project.

composer require enricodias/email-validator

Basic Usage

$emailValidator = new \enricodias\EmailValidator\EmailValidator();
$emailValidator->validate('[email protected]');

$emailValidator->isValid();      // false, gmail.co doesn't have valid MX entries
$emailValidator->isDisposable(); // false, gmail.co isn't a known domain for disposable emails
$emailValidator->isAlias();      // true, [email protected] is alias for [email protected]
$emailValidator->didYouMean();   // [email protected]

Service Providers

A service provider is a third party service that validates the email, usually using an API. You may register several providers to be used on the validation.

The registered providers will be used in sequence until one of them returns a valid response. This is especially useful if you want a provider to act as a failover.

MailCheck.ai is enabled by default.

$MailboxLayer = new \enricodias\EmailValidator\ServiceProviders\MailboxLayer('API_KEY');

$Mailgun = new \enricodias\EmailValidator\ServiceProviders\Mailgun('API_KEY');

$emailValidator->addProvider($MailboxLayer, 'MailboxLayer');
$emailValidator->addProvider($Mailgun); // the name is optional

$emailValidator->validate('[email protected]');

Implemented providers

Provider	Free Tier	Cost per validation	Unsupported Features
MailCheck.ai	120 verifications per hour	Free	isHighRisk()
MailboxLayer	250 verifications per month	$0.002 to $0.0006
NeverBounce	1000 verifications	$0.008 to $0.003	isHighRisk()
Kickbox	100 verifications	$0.010 to $0.004
Mailgun	0	$0.012 to $0.0025	didYouMean()**

* Validator.pizza is now called MailCheck.ai ** the feature is documented but as for now, the API never returns a suggestion.

Custom providers

You can add a custom provider by implementing the class ServiceProviderInterface. It's possible to remove the default MailCheck.ai provider using removeProvider() method or remove all all providers using clearProviders() method:

$emailValidator = new \enricodias\EmailValidator\EmailValidator();

$emailValidator->clearProviders(); // remove all providers

$emailValidator->addProvider($CustomServiceProvider, 'My Custom Provider');

$emailValidator->validate('[email protected]');

You can use the static method create() to create an instance and chain methods:

$emailValidator = \enricodias\EmailValidator\EmailValidator::create()
    ->removeProvider('MailCheck.ai');
    ->addProvider($CustomServiceProvider)
    ->validate('[email protected]');

Note that providers registered without a name cannot be removed by removeProvider().

Shuffle providers

Shuffling the service providers list is useful when using the free tier of multiple providers. Without shuffling, the providers will always be used in the same order resulting in unnecessary failures when the first provider runs out of credits.

$emailValidator->clearProviders()
    ->addProvider($Provider1)
    ->addProvider($Provider2)
    ->shuffleProviders()
    ->validate('[email protected]');

How it works

The class checks locally if the email syntax is valid and if so, it calls a service provider.

Rate limit

Since most service providers are either paid or have a limit of requests per hour per ip, no request is made if the email doesn't pass on the local validation checks.

Local domain list

To lower the number of API requests the local checks include a list with the most common disposable domains. This list is intended to be short in order to not affect performance and avoid the need of constants updates. Wildcards * are allowed.

Additional Domains

It's likely that the most popular disposable email services among your users are not on the default list, so you may want to customize the list using the addDomains() method:

$emailValidator = \enricodias\EmailValidator\EmailValidator::create()
    ->addDomains(['*.domain.com'])
    ->validate('[email protected]',);

$emailValidator->isDisposable(); // true

This method doesn't accepts a string, only an array.

Validation methods

isValid()

Returns true if the email is valid.

The email is considered invalid if it fails on the local syntax check OR if it fails in the service provider's check. Note that disposable emails are valid emails.

isDisposable()

Returns true if the email is a disposable email.

isAlias()

Returns true if the email is an alias. Example: [email protected] is an alias of [email protected].

didYouMean()

If the email has a simple and obvious typo such as gmail.cm instead of gmail.com this method will return a string with a suggested correction, otherwise it will return an empty string.

It's recommended to use this feature using javascript in the client side with an option for them to correct the email before submitting the form

isHighRisk()

Most service providers have a risk analysis tool. This method returns true if the risk is high.