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From: Chuck Swiger <cswiger@mac.com>
To: Montag <montag@activeattack.com>
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On May 19, 2008, at 4:17 PM, Montag wrote:
> host mx1.free.bsd.org said: my.mywebsite.com: Helo command rejected:
> Host not found (in reply to RCPT TO command))
> freebsd-questions@freebsd.org
>
> Any thoughts?

Many mailservers check that the HELO/EHLO response is a valid  
hostname.  You can either configure your machine to use a valid  
hostname (consider dyndns.org or similar, if you like), or you can  
relay your email to something like your ISP's mailserver using  
relayhost parameter or the transport mechanism....

-- 
-Chuck