>The "peer name unknown" is AOL's own message they made up. You can only
> >guess as to what they mean by it.
peer is the tcp/ip session peer, ie, troy�s MTA.
> However, with the "250" code, AOL is
> >continuing the session normally.
silversidechurch.org, the @senderdomaain, has both A and MX, but
mail.twinstar.com�s ip is not delegated below uu.net and uu.net has no PTR
for it.
Lists# dig -x 208.255.176.2
; <<>> DiG 8.3 <<>> -x
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 4
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUERY SECTION:
;; 2.176.255.208.in-addr.arpa, type = ANY, class = IN
;; AUTHORITY SECTION:
255.208.in-addr.arpa. 6H IN SOA auth00.ns.uu.net. hostmaster.uu.net. (
137 ; serial
6H ; refresh
1H ; retry
2w6d ; expiry
6H ) ; minimum
I don�t think AOL checks the A and PTR match, but I bet they do require
that at least that the peer MTA's ip has reverse delegation AND any ol PTR
in there.
Len
http://MenAndMice.com/DNS-training
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