Needed spf.pobox.com change - Attn webmasters

Note:  We will soon, I hope, have a separate list for this kind of thing,
but in the meantime....

http://spf.pobox.com/contact_us.html

Could we get a change to make the e-mail address mandatory or at least point
out in the text that if they don't leave an e-mail address, we'll have no
way to get back in touch with them?

Scott K