Re: POP before SMTP trouble and orher questions

[Andrey G. Sergeev (AKA Andris)]

Hello!


Monday, May 07, 2001, 10:52:42 PM, Urke <[EMAIL PROTECTED]> wrote:

<lost>

U> Second question is why in headers for my post is placed:
U> X-Apparently-From: <urosevic?[EMAIL PROTECTED]>

Hmm... ask a [EMAIL PROTECTED] for this.

U> and
U> X-Lookup-Warning: reverse lookup on original sender failed

It's simple, just looking at your headers:

---[Cut]---
Received: from unknown (HELO 192.168.2.36) (212.62.52.154)
               ^^^^^^^                      ^^^^^^^^^^^^^
  by smtp.mail.vip.sc5.yahoo.com with SMTP; 7 May 2001 19:10:49 -0000
---[Cut]---

Your computer has a 212.62.52.154 IP address and probably a some
hostname attached to this IP, i.e.

hostname.domain.tld. = 212.62.52.154

It means that someone looking for your IP address could query for the
hostname.domain.tld. and got a 212.62.52.154 as an answer.

But if there is no *reverse* assignment i.e.

212.62.52.154 = hostname.domain.tld.

then the reverse lookup call made by virtually every mail server in the
world will fail, this event will be logged and the following X-Header
will appear in your message.

Actually the 212.62.52.154 address has no reverse assignment:

[andris@raibina]$ host -t ptr 212.62.52.154
Host not found.

Your ISP doesn't have the properly done reverse delegation on
212.62.52.0/24 netblock. You should contact [EMAIL PROTECTED] or "Kalman
Cinkler" <[EMAIL PROTECTED]> to fix that.

I also wonder that the HELO issued by your computer is "192.168.2.36" -
what you have under the "DNS Configuration" tab in the TCP/IP
properties?


-- 

Yours sincerely,

Andrey G. Sergeev (AKA Andris)     http://www.andris.msk.ru/

-- 
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