I always used these in the past and ips does not use one from what i can see. I thought ok not a big deal but in webmaster tools right now i have over 15k errors mostly from several different things. Some from links with a ?do=email at the end.

So does someone have a working robots.txt that wont break anything? because right now i feel as though this is hurting my search rankings? because all of the searches come back to error pages that are forbidden?

 

You can try: 

Disallow: /*?do=email

This will disallow anything with ?do=email in it.

Also, someone posted their robots -> https://community.invisionpower.com/topic/422077-my-robotstxt-fpr-ipb4/#comment-2590585