You got non-routable IPs in a Internet-accessible zone, specifically for
your two of your three MX hosts.
<quote>
C:\Documents and Settings\acampbel>dig @odin eservicesforyou.net any
;; ANSWERS:
eservicesforyou.net. 600 A 68.164.114.3
eservicesforyou.net. 600 A 192.168.41.38
eservicesforyou.net. 600 A 192.168.41.34
eservicesforyou.net. 3600 NS ns2.eservicesforyou.net.
eservicesforyou.net. 3600 NS ns1.eservicesforyou.net.
eservicesforyou.net. 3600 NS srv1.eservicesforyou.net.
eservicesforyou.net. 3600 SOA ns2.eservicesforyou.net.
support.eservicesforyou.com. (
2003082754 ; serial
3600 ; refresh (1 hour)
600 ; retry (10 mins)
1814400 ; expire (21 days)
3600 ) ; minimum (1 hour)
eservicesforyou.net. 3600 MX 10 srv5.eservicesforyou.net.
eservicesforyou.net. 3600 MX 10 srv3.eservicesforyou.net.
eservicesforyou.net. 3600 MX 20 srv1.eservicesforyou.net.
;; ADDITIONAL RECORDS:
ns2.eservicesforyou.net. 3600 A 192.168.41.34
ns1.eservicesforyou.net. 3600 A 192.168.41.38
srv1.eservicesforyou.net. 3600 A 68.164.114.3
srv5.eservicesforyou.net. 1200 A 192.168.41.40
srv3.eservicesforyou.net. 1200 A 192.168.41.42
srv1.eservicesforyou.net. 3600 A 68.164.114.3
</quote>
adamc
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Len Conrad
Sent: Tuesday, June 13, 2006 12:36
To: [email protected]
Subject: RE: [IMail Forum] OHN has a private IP address
>Len, it is not a problem with DNS as far as I can tell, it is how the
>Imail registry has the value and Imail is using that value.
As you know, the remote MTAs only see Imail's public IP in the TCP/SMTP
session coming from the outside of the NAT box.
The only way a remote MTA could discover the internal IP of Imail is through
DNS query for the whatever Imail announces as domain name in the HELO
command as SMTP client or in the SMTP greeting as SMTP server.
dig +sh mail.eservicesforyou.net a
192.168.41.39
... definitely not recommended.
Well, another way to discover internal IPs would be looking for IPs in the
Received: headers of the DATA command, but little weight should be given to
forgeable Received: headers.
Len
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