On 04/12/12 4:35 AM, Peter Peltonen wrote:
> $ host 205.234.223.198
> 198.223.234.205.in-addr.arpa domain name pointer mx4.servershost.net.
>
> $ host mx4.servershost.net
> mx4.servershost.net has address 66.225.237.241
>
> As you can see the DNS resolves to different IP address than given by
> the PTR record. Some email systems consider this as an indication of a
> misconfigured mail server (spam sending attempt) and refuse to relay.
except, thats the receiving server, and it shouldn't be rejecting itself.
$ host -t MX tata-nigeria.com
tata-nigeria.com mail is handled by 30 mx4.servershost.net.
tata-nigeria.com mail is handled by 10 mx2.servershost.net.
tata-nigeria.com mail is handled by 20 mx3.servershost.net.
$ host mx4.servershost.net
mx4.servershost.net has address 66.225.237.241
the host is probably dualhomed, and that 66 IP matches the reverse...
$ host 66.225.237.241
241.237.225.66.in-addr.arpa domain name pointer mx4.servershost.net.
servershost.net appears to be a US based hosting company, yet their
WHOIS data is shrouded, and they dont have any websites at that domain
name, further
http://rbls.org/servershost.net
says they are broken, and have no postmaster or abuse alias as required
by the internet RFCs.
--
john r pierce N 37, W 122
santa cruz ca mid-left coast
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