Grays manager Mark Stimson has denied using the 'mole' information - and has claimed that it was only one call.
Exeter's official site claimed that Stimson had received calls before both the second leg FA Trophy semi final and Monday's Conference match both detailing tactics and line-up of their opposition. Stimson denies the first call and admits the second, but denies using the information.
Stimson told the BBC: "Me and Alex are managers against each other but we are also friends and if I can help him I will and I'm sure he would do the same. I didn't take too much notice of the call but I passed on the information to Alex to help him in the future because whoever did it might ring up the next manager.
"If you have got a spy in the camp you need to be aware of it. He has obviously taken it on board and they are trying to find out who did it. It (the call) did not change my views on how we were going to play. We have got a certain way of playing and we try not to concentrate too much on the opposition and focus on what we do."