cpanel: lowest numbered MX record points to local host

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Posted on August 22, 2008

error
using a remote mail server while being hosted on a cpanel server. you will need to remove the domain from the localdomains file. You will then need to add the same domain to the remotedomains file.
or
rejected RCPT <user@domain.com>: lowest numbered MX record points to local host or error 451

solution

make sure the domain exist in /etc/localdomainsĀ  if it does not , adding the domain should fix this error