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Question
Remote host said: 450 Client host rejected: cannot find your hostname,
We have a linux shared server which has many virtual domains o get hosted and also as a mail server.
We have given 0.0.0.138 for mailserver and 0.0.0.143 for webserver and both of them resolves to a common hostname. While sending mails to particular domain it was rejected saying "Remote host said: 450 Client host rejected: cannot find your hostname" in which 0.0.0.138 fails the forward lookup.
We have added 0.0.0.138 as a spf record in DNS too. What can we do in this regard to solve this issue.
A reverse lookup on 0.0.0.138 states that it identifies itself as test.com.
A forward lookup on test.com however states that the only machine for this domain name is 0.0.0143.
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by: jar3817Posted on 2008-08-01 at 04:42:14ID: 22137266
Both of these IPs are on the same machine right? Instead of having them both point to the same domain name (test.com), have each one point to its own:
0.0.0.138 => mail.test.com
0.0.0.143 => web.test.com
Then set the appropriate PTR records for both those names to point back to those IPs and you should be fine.