NoRFCWarningsValidation example

$constraint->mode = $this->defaultMode;
        }

        if (!\in_array($constraint->mode, Email::VALIDATION_MODES, true)) {
            throw new InvalidArgumentException(sprintf('The "%s::$mode" parameter value is not valid.', get_debug_type($constraint)));
        }

        if (Email::VALIDATION_MODE_STRICT === $constraint->mode) {
            $strictValidator = new EguliasEmailValidator();

            if (interface_exists(EmailValidation::class) && !$strictValidator->isValid($value, new NoRFCWarningsValidation())) {
                $this->context->buildViolation($constraint->message)
                    ->setParameter('{{ value }}', $this->formatValue($value))
                    ->setCode(Email::INVALID_FORMAT_ERROR)
                    ->addViolation();

                return;
            } elseif (!interface_exists(EmailValidation::class) && !$strictValidator->isValid($value, false, true)) {
                $this->context->buildViolation($constraint->message)
                    ->setParameter('{{ value }}', $this->formatValue($value))
                    ->setCode(Email::INVALID_FORMAT_ERROR)
                    ->addViolation();