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Date:      Sat, 28 Dec 2002 19:15:49 +0100 (CET)
From:      Andrew Prewett <>
To:        freebsd-questions@FreeBSD.ORG
Subject:   Re: What are the SMTP rules for sending mail to FreeBSD
Message-ID:  <>
In-Reply-To: <>
References:  <>

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Today Harry Tabak wrote:

> Mail sent from my main server, (
> gets rejected.
>    _450_Client_host_rejected:_cannot_find_your_hostname,_[]

 If 450 is some error code, then it's only a _temporary_ error/failure
(RFC 1893). Maybe the DNS servers using the old (cached) data.


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