Rediffmail started out advertising its mail service at lightning speed and all that stuff. To start with Rediffmail was really fast but gradually started losing speed. maybe the increasing number of subscribers was a reason.
But even still that was ok. The big minus point was the using and handling of attachments. Every attachment that I sent with rediffmail never reached it’s destination. That is when I decided to stop using. Some of it’s usage is also not very user friendly.
Many of my friends have also stopped using rediffmail after using it for some time. Perosonally, rediffmail is not a good choice when there are more reliable sources like Hotmail, Yahoo, etc. available.