I am unable to send email with my account.
Keep getting that exceeded 500 emails for the day.
1. I have only sent about 10 emails today.
2. I have never sent 500 in a day... (I'm no spammer, and I dont have that much of time)

Please find out what's going on here for me.
Thank you.

No - the error message might be outdated. Due to excessive spamming, we have to set a tight limit on number of emails that can be sent from a free account. 

As you read the FAQ at:

http://www.drivehq.com/email/

A free account can only send 5 emails/day.