Reverse lookup of selected IP addresses without delegation agreement?

Len Conrad LConrad at Go2France.com
Thu Jul 15 16:48:11 UTC 2004


>Do I understand correctly that you're suggesting to have my own server
>return lists.sourceforge.net instead of mail.sourceforge.net? Is that
>what you mean by "match official PTR"?

yes, because MTAs like postfix will consider a PTR hostname to be invalid 
if the PTR hostname doesn't have matching A record (to catch spammers 
forging their PTR as aol.com, which is a PTR hostname probably whitelisted 
by a lot of MXs)

Len


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