Only reason I use sitemails with anyone during my recruiting is AFTER a recruit we were fighting for signed. Then it would be to congratulate him if he won. Maybe offer condolences if he lost and was a friend/conference mate. In few instances when the numbers just don't seem to be right after the recruit signs I might win or lose ask if he wanted to swap data on what we each spent on the recruit for information to improve my future recruiting and those who I mentor. Sometimes it is as simple as an unexpected preference, sometimes it's a huge dump of AP, sometimes it tells me I am on the low side of the prestige grade when I thought I was on the high or middle, but usually for my teams it is that I lost to one of those few that have an A+ prestige that is more like an A+++.
That's it.