whitelisting poorly configured mail servers

[grungy]

I have a client who needs to get mails from certain people that have poorly configured servers....the problem is they send mails from local server with dynamic ip address and non existent hostname:

Code:

Jul 21 19:15:31 emperor postfix/smtpd[7329]: NOQUEUE: reject: RCPT from 82-68-135-86.dsl.in-addr.zen.co.uk[82.68.135.86]: 550 5.7.1 <cleint@domain>: Recipient address rejected: Mail appeared to be SPAM or forged. Ask your Mail/DNS-Administrator to correct HELO and DNS MX settings or to get removed from DNSBLs; MTA helo: ms01.freighttransport.local, MTA hostname: 82-68-135-86.dsl.in-addr.zen.co.uk[82.68.135.86] (helo/hostname mismatch); from=<patrick.burnel@freighttransport.co.uk> to=<cleint@domain> proto=ESMTP helo=<MS01.freighttransport.local>

Is there a way to allow my client to receive mails from this poorly configured server...he keeps bugging me about how he is loosing money

some kind of whitelist? searched the forum but did not find a way to whitelist a domain name, only ip address, which is dynamic so it does not help me at all...

tnx