Does IP have DNS or not?

This came in a few days ago, and so I contacted the postmaster there=20
regarding his system having a problem:

Jul=A0 1 21:19:02 localhost postfix/smtpd[509]: connect from=20
unknown[63.82.232.8]
Jul=A0 1 21:19:04 localhost postfix/smtpd[509]: NOQUEUE: reject: RCPT=20
from unknown[63.82.232.8]: 550 Client host rejected: cannot find your =20=

hostname, [63.82.232.8]; from=3D<***@hometel.com>=20
to=3D<***wrightthisway.com> proto=3DSMTP helo=3D<mail.hometel.com>
Jul=A0 1 21:19:04 localhost postfix/smtpd[509]: disconnect from
unknown[63.82.232.8]

He has responded back saying his info resolves fine, claiming the issue=20=

is on my end. I tried resolving that IP both on my home system and=20
work system (different ISP/DNS servers), and both came back as:

** server can't find 8.232.82.63.in-addr.arpa: NXDOMAIN

However, in between those two I went to remote.12dt.com/rns/ to do a=20
reverse lookup on that address, and it responded with ns2.hometel.com=20
for that IP.

So, I'm assuming that he still has some DNS issues on his end, but I=20
don't know enough about such things to tell him what the problem is. =20
Or is there really a problem on my end somehow?=