You need a _host_ name not a domain..
#nslookup 208.100.1.33
Server: 10.0.1.1
Address: 10.0.1.1#53
Non-authoritative answer:
33.1.100.208.in-addr.arpa name = ics-il.net.
Authoritative answers can be found from:
1.100.208.in-addr.arpa nameserver = ns3.nozonenet.com.
1.100.208.in-addr.arpa nameserver = ns.nozonenet.com.
1.100.208.in-addr.arpa nameserver = ns4.nozonenet.com.
1.100.208.in-addr.arpa nameserver = ns2.nozonenet.com.
ns2.nozonenet.com internet address = 216.86.146.5
ns.nozonenet.com internet address = 216.86.146.6
#
Tell your provider to put in something like this:
33.1.100.208.in-addr.arpa name = mail.ics-il.net.
ryan
On Oct 3, 2007, at 2:54 PM, Mike Hammett wrote:
I have a user trying to email someone at UIUC. Here is the error
generated:
Connected to 128.174.5.12 but sender was rejected.
Remote host said: 451 4.1.8 Possibly forged hostname for
208.100.1.33 I'm not going to try again; this message has been in
the queue too long.
I call in and they tell me I need to fix my reverse DNS. They're
the first ones to have a beef with it, so I contact my provider to
have him change the reverse DNS to ics-il.net, which is the domain
my client is mailing from. Now I get this error:
Connected to 128.174.5.120 but sender was rejected.
Remote host said: 550 5.7.1 Fix reverse DNS for 208.100.1.33
Ideas?
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
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