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Date:      Mon, 01 Jul 2002 21:51:47 -0700
From:      Ryan Grove <ryan@wonko.com>
To:        Martin Schweizer <pcservi@spectraweb.ch>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Can't send e-mail to freebsd lists
Message-ID:  <3D213163.2070207@wonko.com>
References:  <3D209CC6@smtp.spectraweb.ch>

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Martin Schweizer wrote:
> Hello
> 
> After successfully update to FreeBSD 4.6 I can't send e-mails to any freebsd 
> mailinglist. I re-make also sendmail.cf (from freebsd.mc) but whithout 
> success. I can send and receive e-mail from and to other receipients without 
> problems. If I send an e-mail to a freebsd list the following error occurs:
> 
> - in maillog:
> Jul  1 21:50:00 saturn sm-mta[170]: starting daemon (8.12.5): 
> SMTP+queueing@00:30:00
> Jul  1 21:51:33 saturn sm-mta[171]: g614wFbn001097: 
> to=freebsd-questions@freebsd.org, delay=14:53:18, xdelay=00:01:32, 
> mailer=esmtp, pri=120358, relay=mx1.freebsd.org. [216.136.204.125], dsn=4.2.0, 
> stat=Deferred: 450 Client host rejected: cannot find your hostname, 

That's because the FreeBSD.org mail servers do a reverse-DNS lookup to 
filter out potential spam. See this FAQ entry for more info:

http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/misc.html#FREEBSD-MAIL-BOUNCES

-- 
Ryan Grove
ryan@wonko.com
http://wonko.com/


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