Question about a forensic tool

I just have a quick couple of questions. I used the program icopybot to look for old emails. Under the recents section there are email addresses as well as phone numbers that had mail & SMS sent to. There are time stamps beside them. My question is are those times only recorded if an email has DEFINITELY been sent (in this case a craigslist email link)? There are actually more than one time stamp beside each. Are those sent correspondence only or received correspondence as well?Lastly, the address hash number that's listed next to each of these email addresses.....is that something that can actually be used to find the actual message in this iTunes backup? Or is that even possible? i sent an email to icopybot twice with no response.

Thanks for the information!