Rich Shepard <[EMAIL PROTECTED]> wrote:

> On Mon, 28 Jul 2008, Charles Marcus wrote:

[...]

>> Are you doing SAV (Sender Address Verification)? You should NOT use SAV 
>> for general mail reception, you should only do SAV probes for sending 
>> domains you control and/or have gotten explicit permission to do SAV for.
>
>   Not sure if that's enabled under a different name.

Sender Address Verification (SAV) is done in Postfix with the  
reject_unverified_sender parameter; see postconf(5) for details.  Before 
employing this feature, make sure you understand its implications and read 
the ADDRESS_VERIFICATION_README.
   
>> Disable SAV... you will never be able to receive mail from the big vendors
>> (gmail, hotmail, yahoo) if you are doing SAV probes all the time...
>
>   I've had no problems -- and still don't -- receiving mail from gmail,
> hotmail, or yahoo accounts except for this one instance.
>
>   The sender (@hotmail.com) is using another company's server
> (somedomain.com) between her and cox.net. It's that other company's server
> to which I cannot trace the route and where dig and whois do not supply the
> same IP address and domain name.
    
There are several references to access(5) maps in your main.cf; do any of 
them have reject_unverified_sender as an action on the RHS?  Check with:
                    
# grep reject_unverified_sender /path/to/maps/folder/*  
                        
[...]

-- 
Sahil Tandon <[EMAIL PROTECTED]>

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