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how do i configure reverse lookup on a lotus domino email server? EXTREMELY UGRENT!!

i am not recieving email from a customer. They are running an in house Lotus Domino email server and receiving an error message that reads:

host vscan1.anet.com [ip address] said: 450 4.7.1 Client host rejected: cannot find your hostname, [ip address] (in reply to RCPT TO command.)

these are orders being placed and since i have never used the Domino system before, im not sure what to do. i contacted my email host and from what they told me, they said that there was a problem with the nslookup; there was an extra octet. i tried to get a hold of this company's IT department to inform them that there was a problem on their side and that something needs to be done with reverse lookup, but i was told that he does not have access to that information. this is extrememly urgent! anyone have any ideas?
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repco
Asked:
repco
3 Solutions
 
sg405222Commented:
Simple answer is you don't.  You need to set this in DNS as a record with a PTR type

Take a look at www.dnsstuff.com for some tools that will check that IP addresses have correct PTR records set also some good explinations about DNS and how it all works
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sg405222Commented:
Sorry re reading that let me add You dont on the Domino server - add or correct the PTR record
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repcoAuthor Commented:
how do i go aboout doing that? i've never used domino before and i have to explain it over the phone to this companies IT guy who really doesnt seem to know too much about what i was talking about regarding DNS or reverse lookup.
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SysExpertCommented:
The problem is NOT domino related, but rather DNS of the company sending you mail. They are missing a reverse DNS PTR.They need to run
a free report on
http://www.dnsreport.com/ and fix their DNS.

I hope this helps !
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brwwigginsCommented:
usually your ISP will hold the reverse PTR records since they actually own the IP address block. Have them call their ISP and see if they can set this up
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