[Cialug] 550 error

[Kevin C. Smith]

Anyone know how to deal with this?
I have one static IP serving two domains teamcsa.org
mainstreamliving-dsm.org.
A user who's address is <name>@mainstreamliving-dsm.org sends mail to a
person and we get this error in the mail log:

Feb 24 09:44:05 csaserver postfix/smtp[2424]: F401EB7E9:
to=<[name]@statstaff.c om>, relay=mail.statstaff.com[63.227.71.201],
delay=6, status=bounced (host mail .statstaff.com[63.227.71.201] said: 530
Relayed mail to [name]@statstaff.com not allowed (in reply to RCPT TO
command))

This may be related: ??
kevins@ubuntu:~ $ host -t PTR 66.43.220.240
240.220.43.66.in-addr.arpa domain name pointer www.teamcsa.org.

-- 
Kevin C. Smith