I honestly never thought that this would be advice that I would give, but after slush letter #5 that made this mistake, I feel that I ought to bring it to your attention.
Writers. When you include your SASEs in your query letters, do us both a favor.
Address it to yourself.
Not to us.
I don’t need to get the rejection letter than I sent you.
You people think I’m kidding. I’m not kidding. This is the fifth SASE I’ve gotten addressed to the publishing house, listing the person’s own address as the return address.
Don’t do it.