Short answer

iRage doesn’t allow Rediffmail email registration due to security concerns and email delivery issues.

Reasons for Rediffmail restriction

Increased cyberattacks: iRage has observed an increase in cyberattacks targeting Rediffmail accounts. When you log in from a new city or IP address, iRage sends an email alert to notify you of possible account breaches.

Email delivery problems: Emails sent by iRage are frequently not delivered to Rediffmail addresses. Since iRage sends all important communication via email, you must receive all these emails reliably.

If you already use Rediffmail

If you have already opened your account with a Rediffmail email ID, you should change your registered email to ensure proper communication and security.