Reddiffmail.com — Not able to login (Temporary error occured[#5001], please try again)

Address: [email protected]

I have been trying to login to all my old emails. Even though I have changed my password can't login to access my emails. Whenever I try and login it gives me the error (Temporary error occured[#5001], please try again)

The account is almost 15 years old but it recognises the email id

[protected]@rediffmail.com

my alternate email is Farhan.[protected]@gmail.com