Re: What are the SMTP rules for sending mail to FreeBSD

[Harry Tabak]

Date: Sat, 28 Dec 2002 14:50:54 +0100
From: rocky <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
CC: rocky <[EMAIL PROTECTED]>
References: <[EMAIL PROTECTED]>

Harry Tabak wrote:

 > Mail sent from my main server, gatehouse.quadtelecom.com
 > (66.45.116.138) gets rejected.
 >   _450_Client_host_rejected:_cannot_find_your_hostname,_[66.45.116.138]
 >
 > What are the rules for sending mail!!!!!  I'm not a spammer -- I've
 > never sent spam!!!   Your rejection is very disconcerting.
 >
 > Harry Tabak
 > <[EMAIL PROTECTED]>
 >
# nslookup 66.45.116.138
Server:  ns1.ljusdal.net
Address:  80.65.204.5

Name:    steelcityhosting.com
Address:  66.45.116.138


66.45.116.138 does not resolve to gatehouse.quadtelecom.com, it resolves
to steelcityhosting.com.
Fix your reverse and it will most likely accept your emails.

--
R

Easier said than done. I've been assigned 66.45.116.136/29 by the ISP. I control DNS for quadtelecom.com, but I don't control the reverse lookup. I'd like to know the exact algorithm in use, so that I can negotiate with my ISP. For example, how are are hosts with multiple IP adresses handled?

Harry

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