Expanded class hierarchy of TestHtmlMailCollector in Drupal 9
- class \Drupal\Core\Mail\Plugin\Mail\PhpMail implements MailInterface
- class \Drupal\amazon_ses\Plugin\Mail\AmazonSes implements MailInterface, ContainerFactoryPluginInterface uses AmazonSesHandlerTrait
- class \Drupal\business_rules\Plugin\Mail\BusinessRulesMail implements MailInterface
- class \Drupal\Core\Mail\Plugin\Mail\TestMailCollector implements MailInterface
- class \Drupal\mail_html_test\Plugin\Mail\TestHtmlMailCollector
- class \Drupal\forward\Plugin\Mail\ForwardMail
- class \Drupal\forward\Plugin\Mail\ForwardMail
- class \Drupal\simple_mail\Plugin\Mail\SimpleMail implements MailInterface
- class \Drupal\system_mail_failure_test\Plugin\Mail\TestPhpMailFailure implements MailInterface
- class \Drupal\webform\Plugin\Mail\WebformPhpMail