Dear correspondent who just forwarded me the same email he sent two days ago:

I understand that you are impatient for a response. However, I receive more email about format questions than I can deal with quickly, and just because I haven't responded immediately does not mean I am ignoring your questions. I will get to yours after I've answered earlier messages.

In the meantime, please refrain from getting so impatient that you repeatedly forward the same message to me. If you can't wait more than two days for a response from me, how on earth are you going to deal with the slow wait for a response from a publisher?

Love,
The Formatting Grump