No mail address is not an issue for Restricted Refund.However your phone number or E-mail in bank should be same in IT portal which enables for EVC enabled bank account. EVC enabled will help you in E-verification of your return. Ofcourse you can also E-verify through Aadhaar OTP subject to condition that your mobile number is feeded in Aadhaar data base.For Restricted refund only name in bank should match with name in PAN data base.