I know you didn't, and that's why I corrected you. It seems you're the one who should be reading a little more carefully.
Let's go over the original post again, shall we?
Here, the original poster says that he is using Dreamhost-hosted recipient addresses. He then goes on to talk about where the form itself appears:
And finally, he gives an example:
$ host arroyo-rp.com
arroyo-rp.com has address 220.127.116.11
$ host 18.104.22.168
22.214.171.124.in-addr.arpa domain name pointer linhost207.mesa1.secureserver.net.
And another five seconds to see that the form is submitting data to the Dreamhost-provided formmail script, with a Dreamhost-hosted recipient address:
<form action="http://formmail.dreamhost.com/cgi-bin/formmail.cgi" method="post">
<input name="recipient" value="email@example.com" type="hidden">
$ host ohsodesign.com
ohsodesign.com has address 126.96.36.199
$ host 188.8.131.52
184.108.40.206.in-addr.arpa domain name pointer basic-vat.raiden.dreamhost.com.
Hope this helps!
Edit: I see the original poster has now corrected this assumption as well.
If you want useful replies, ask smart questions.