Registration email comes from "webmaster@localhost"

[ojacobson]

STR:

1. Sign up for a new account.
2. Open the confirmation email.
3. Inspect the From: address.

Expected:

The email is from some no-reply bucket address at wheretofind.me.

Actual:

The email is from webmaster@localhost.

This may cause registration emails to be discarded by spam filters, and in any case it makes it hard for users to recognize the email later.