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nevyana2006

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mail server 451 error

We are getting this error on an e-mail to domain: cnd.co.nz
20111031 113236 127.0.0.1       SMTP (a69d01910000722f) 451-Unable to
validate neviana@sat-tel.com with the MX mailserver for
20111031 113236 127.0.0.1       SMTP (a69d01910000722f) 451 sat-tel.com
(tested with a fake bounce back)
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Brian B
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nevyana2006

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its strange, as e-mail from a different domain is delivered. and on our domain we don't have another issue of the same nature. we are hosting the dns and there is a rDNS record.
Not that I believe the issues reported are causing this problem, you should really go to www.dnsstuff.com and run a report on your domain. You have several RFC violations in your config that you should attempt to resolve.

thank you both