alot rejecting emails , why ?

[servertweak]

i have a large list of reject emails in my log and plus i had a client made a ticket about this:




This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

[email protected]
SMTP error from remote mailer after RCPT
TO:<[email protected]>: host mx.frontiernet.net
[66.133.129.70]: 554 Client host rejected: cannot find your hostname, [64.71.131.179]. See http://postmaster.frontiernet.net

 

[nobaloney]

Do you have working nameservers in reolv.conf?

Jeff