HowTo - Create and register a mail provider

This HowTo describes how to create and register a mail provider you want to use.

The mail provider is defined in the provider class. Since each provider behaves differently, the provider class will also be different.

1. Create a class which implements MailProviderPluginInterface. After that, register your provider in the Mail module.

2. To register a provider, add it to MailProviderCollection by adding the provider to MailDependencyProvider:

<?php
namespace Pyz\Zed\Mail;

...

public function provideBusinessLayerDependencies(Container $container)
{
    ...

    $container->extend(self::MAIL_PROVIDER_COLLECTION, function (MailProviderCollectionAddInterface $mailProviderCollection) {
        $mailProviderCollection->addProvider(new YourProviderPlugin(), MailConfig::MAIL_TYPE_ALL);

        return $mailProviderCollection;
    });

    ...
}
...

By using $container->extend(), you get the MailProviderCollectionAddInterface where you can add your provider. The MailProviderCollectionAddInterface::addProvider() takes the provider you want to use as the first argument, and as the second argument, one MailType or a list of MailTypes which should be handled by this provider.

As you can see in the preceding example, the provider is registered to all MailTypes by using MailConfig::MAIL_TYPE_ALL. If you want the provider to only handle a specific MailType, use the MailType constant from your MailTypePlugin—for example, CustomerRegistrationMailTypePlugin::MAIL_TYPE. For information about how to create and register a MailTypePlugin, see HowTo: Creating and registering a MailTypePlugin

Use more than one provider

To send emails through different providers, register more than one provider to the Mail module. You can even create a scenario when all marketing emails go through provider A, and all others - through provider B. In Register the Mail Provider you already made use of this technique to register one provider to all types. The following example demonstrates how to wire up more than one provider:

<?php
namespace Pyz\Zed\Mail;

...

public function provideBusinessLayerDependencies(Container $container)
{
    ...

    $container->extend(self::MAIL_PROVIDER_COLLECTION, function (MailProviderCollectionAddInterface $mailProviderCollection) {
        $mailProviderCollection
            ->addProvider(new ProviderAPlugin(), [MailTypeA::MAIL_TYPE, MailTypeB::MAIL_TYPE])
            ->addProvider(new ProviderBPlugin(), MailTypeC::MAIL_TYPE);

        return $mailProviderCollection;
    });

    ...
}
...

If a MailType can be handled by more than one provider, the email will be sent by both of them.