>And the .xiolink.com full text lookup returns a dotted/dashed IP
>address used by most dialup/residential customers and for most of >us...

That's not really true.  A dotted-dashed IP-like hostname is a common 
placeholder used by ISPs for IPs whose customers have not requested a PTR, even 
including large commercial accounts.  That's not the same as a PTR that *also* 
includes '-dialup', '-dsl', etc.

More important, why would you think that whitelisting based on the REVDNS 
domain of a known and targeted anti-spam company would be trustworthy?

--Sandy


--
------------------------------------ 
Sanford Whiteman, Chief Technologist 
Broadleaf Systems, a division of 
Cypress Integrated Systems, Inc. 
mailto:[EMAIL PROTECTED] 
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