Date: Sat, 28 Dec 2002 14:09:36 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: freebsd-questions@FreeBSD.ORG Subject: Re: What are the SMTP rules for sending mail to FreeBSD Message-ID: <20021228140936.GA45669@happy-idiot-talk.infracaninophi> In-Reply-To: <3E0DACCB.5090402@quadtelecom.com> References: <3E0DACCB.5090402@quadtelecom.com>
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On Sat, Dec 28, 2002 at 08:53:15AM -0500, 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.
You are probably being rejected because the IP number of your machine
doesn't have a PTR record for gatehouse.quadtelecom.com:
happy-idiot-talk:~:% host 66.45.116.138
138.116.45.66.IN-ADDR.ARPA domain name pointer steelcityhosting.com
happy-idiot-talk:~:% host gatehouse.quadtelecom.com
gatehouse.quadtelecom.com has address 66.45.116.138
gatehouse.quadtelecom.com mail is handled (pri=5) by gatehouse.quadtelecom.com
That makes it look like your machine is being used to send e-mails
with forged headers. That's mostly a spammer trick, hence the
rejection.
Either arrange for your ISP to incorporate the correct PTR data or
have them delegate your netblock to you or else configure your mail
system forward all your e-mail via some sort of smart host provided by
your ISP.
Cheers,
Matthew
--
Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks
Savill Way
Marlow
Tel: +44 1628 476614 Bucks., SL7 1TH UK
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