Please allow underscore("_") after "@" part for Editable Email.

As per requirement we need to send Email to a system Email id (xxxxx@xxx_xxx.com) , we could see Jenkins email validation is not allowing due to domain validation ( perhaps due to the reason it has underscore after @ part ).

But as this is system Email id and we cannot use any other Email id can you please change the validation so that it can allow underscore after @ part of Email Id.

Please see the attached screen shot.