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List:       linux-admin
Subject:    Re: sendmail question
From:       Jeffrey Morse <jeffmorse () m4cc ! com>
Date:       2004-05-26 16:10:09
Message-ID: 20040526161009.GJ3584 () m4cc ! com
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Most all isp's and companies are configuring their mail servers to
reject email from servers that do not have a properly configured
reverse dns entry.  One solution would be to have your servers
configured to use a smart relay, and this relay machine has a properly
configured dns for reverse dns lookups and of course this relay will
allow you to relay through it.  You may decide to manage your own dns,
if so just have your isp insert entries into their dns namespace that
says you (your ip block) is responsible for managing the dns records
and then all such queries will be directed to your name servers.

I noticed many servers requiring reverse-dns about 6 months ago
due to the incredible spam problem.

Hope that helps.


* On [05-26-2004 17:48 +0200] Luca Ferrari <fluca1978@virgilio.it> wrote:
> Hi,
> I use sendmail to send automatic emails from servers to my mailbox, to get 
> information about disk status, etc. Now it seems as several mail providers 
> are stopping incoming mails from machines not registered as mail machines. Is 
> there a way to avoid this? I understand that this way of blocking is to 
> prevent spammers, but it is quite bothering if you want to use sendmail for 
> "fair" uses.
> 
> Thanks,
> Luca
> 

-- 
Jeffrey Morse CCNA, MCP, SCJP
jmorse@m4cc.com
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