Someone upthread suggested it was the jealous ex-husband of the mistress, who would certainly have had motive and opportunity to blow it all out to the wife and the governor in an attempt to take revenge or to extort money. Think it through; don’t just go with your prejudices — why would Mrs Sanford have it come out in such a way not only for herself — her own husband’s humiliating words of love to another woman — but also to her four children? It’s totally out of character with someone who has sacrificed so much for her children already.
The emails between Sanford and Chapur were provided by Chapur’s ex-boyfriend who was at her apartment one day and saw an email from the Governor of South Carolina on her computer screen. The boyfriend was furious because he didn’t know about the affair so he hacked into her computer and retrieved all of the emails between Sanford and Chapur. He then sent them anonymously to The State newspaper of Columbia, South Carolina.
The State could not verify their authenticity so they held on to them until the whole affair blew up in the media through the Governor disappearing and two Republican rivals of the Governor, State Senator Jake Knotts and Lieutenant Governor Andre Bauer started raising questions about Mark Sanford’s whereabouts to the Governor’s staff and to the media.
http://www.freerepublic.com/focus/news/2280502/posts