AssertEmail with strict mode does not check for DNS. #34681
Description
Symfony version(s) affected: 4.3
Description
When using
@Assert\Email(mode="strict")
There is no error for a fooBar@gmailcom email value
Possible Solution
The EmailValidator use
$strictValidator->isValid($email, new NoRFCWarningsValidation())
A better check could be
$strictValidator->isValid($email, new MultipleValidationWithAnd([new NoRFCWarningsValidation(), new DNSCheckValidation()]))