Hello Andrey G. Sergeev (AKA Andris),
On Thu, 10 May 2001 at 00:54:33 GMT +0400 (which was 10/05/2001 3:54
GMT +0700 my Local Time) "Andrey G. Sergeev (AKA Andris)"=[AGS] wrote
to Urke :
[...]
U>> X-Lookup-Warning: reverse lookup on original sender failed
AGSAA> It's simple, just looking at your headers:
AGSAA> ---[Cut]---
AGSAA> Received: from unknown (HELO 192.168.2.36) (212.62.52.154)
AGSAA> ^^^^^^^ ^^^^^^^^^^^^^
AGSAA> by smtp.mail.vip.sc5.yahoo.com with SMTP; 7 May 2001 19:10:49 -0000
AGSAA> ---[Cut]---
AGSAA> Your computer has a 212.62.52.154 IP address and probably a
AGSAA> some hostname attached to this IP, i.e.
AGSAA> hostname.domain.tld. = 212.62.52.154
AGSAA> It means that someone looking for your IP address could query for the
AGSAA> hostname.domain.tld. and got a 212.62.52.154 as an answer.
AGSAA> But if there is no *reverse* assignment i.e.
AGSAA> 212.62.52.154 = hostname.domain.tld.
AGSAA> then the reverse lookup call made by virtually every mail
AGSAA> server in the world will fail, this event will be logged and
AGSAA> the following X-Header will appear in your message.
AGSAA> Actually the 212.62.52.154 address has no reverse assignment:
AGSAA> [andris@raibina]$ host -t ptr 212.62.52.154
AGSAA> Host not found.
Perfect explanation, that's exactly the ListServer did.
If reverse lookup successful, there is no X-Lookup-Warning: add by the
Server.
In the past I have activate the Reverse Lookup Checking, but allow the
message passthrough (this is for my statistic purpose, looking for
possibility activate this as Anti Spam for this list). I made special
filter here for that. But now, the research is over, so I (think) was
disable it :-(
AGSAA> Your ISP doesn't have the properly done reverse delegation on
AGSAA> 212.62.52.0/24 netblock. You should contact [EMAIL PROTECTED] or
AGSAA> "Kalman Cinkler" <[EMAIL PROTECTED]> to fix that.
Correct, good recommendation.
AGSAA> I also wonder that the HELO issued by your computer is
AGSAA> "192.168.2.36" - what you have under the "DNS Configuration"
AGSAA> tab in the TCP/IP properties?
Ha..ha...this is also other part of my research, I have to disable
this kind of checking :-)
You're so good, are you working for ISP ?
--
Best regards,
- Syafril -
|Syafril Hermansyah - <[EMAIL PROTECTED]> |
|<www.dutaint.co.id> - <www.dutaint.com> |
Using The Bat! 1.52e
under Windows NT 5.0 Build 2195 Service Pack 1
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