The online validator that you have mentioned is giving error correclty as below :
Not valid.
Error - Line 17, 36: org.xml.sax.SAXParseException; lineNumber: 17; columnNumber: 36; cvc-pattern-valid: Value 'provamail.it' is not facet-valid with respect to pattern '.+@.+[.]+.+' for type 'EmailType'.
But our validator gives error as below :
