AuthenticatorInterface

class \Symfony\Component\Mailer\Transport\Smtp\Auth\CramMd5Authenticator implements \Symfony\Component\Mailer\Transport\Smtp\Auth\AuthenticatorInterface
class \Symfony\Component\Mailer\Transport\Smtp\Auth\LoginAuthenticator implements \Symfony\Component\Mailer\Transport\Smtp\Auth\AuthenticatorInterface
class \Symfony\Component\Mailer\Transport\Smtp\Auth\PlainAuthenticator implements \Symfony\Component\Mailer\Transport\Smtp\Auth\AuthenticatorInterface
class \Symfony\Component\Mailer\Transport\Smtp\Auth\XOAuth2Authenticator implements \Symfony\Component\Mailer\Transport\Smtp\Auth\AuthenticatorInterface