I met an Managingat a regional office for a at an information session four days ago, we had a good chat. I'm writing him an e-mail thanking him for his time, with a couple of question too.
I'm wondering how I should open the e-mail. He introduced himself as "Jack", but his full name is John Smith.
Should I start with:
1) Dear Mr. Smith
2) Dear John
3) Dear Jack
Also, should I be using "Dear", or "Hi"/"Hello" (i.e. something informal)? He was quite personable/informal while talking to me, if that helps.
One last question: should I have followed up immediately after the event, or have I waited the right amount of time?