HowTo: Create and register a mail provider

This guide shows how to create and register a mail provider you want to use.

A mail provider is defined in the provider class. Since each provider behaves differently, the provider class is also different.

Create and register a mail provider

1. Create a class that implements MailProviderPluginInterface.
2. In the Mail module, register your provider.
3. 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 MailProviderCollectionAddInterface, where you can add your provider. MailProviderCollectionAddInterface::addProvider() takes the provider you want to use as the first argument, and as the second argument, a MailType or a list of MailType classes, which this provider must use.

As you can see in the preceding example, the provider is registered to all MailType classes by using MailConfig::MAIL_TYPE_ALL. If you want the provider to handle only a specific MailType, use the MailType constant from your MailTypePlugin—for example, CustomerRegistrationMailTypePlugin::MAIL_TYPE. For information about creating and registering 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 the preceding section, this technique is used 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 class can be handled by more than one provider, the email is sent by both of them.