I honestly figured every one knew this, but if you don't, do it. In-boxes get full, people get busy, spam filters get nasty, and it is always helpful to send a

I honestly figured every one knew this, but if you don't, do it. In-boxes get full, people get busy, spam filters get nasty, and it is always helpful to send a follow-up. Personally, I like to reply to my prior e-mail, then alter the "to" field to contain the e-mail address of the target.