>AOL reverses all domains,
You mean "queries for the PTR hostname of the sending MTA's ip"?
I really doubt that because when I tried to use that criterion on
IMGate, it lasted one nasty Monday morning and I had to back off
since so many valid MTA's were being rejected in the comparatively
minisicule number of MTA's we deal with. Multiply that by the number
of MTA's that AOL's hubs deal with, and I really don't think AOL
could be delivering mail only for MTA's with a PTR hostname.
>if the domain doesn't reverse to their satisfaction,
Do you know what, besides higher stock price, "satisfies" them?
I checked his reverse yesterday and it was just fine. What else could
they want when the reverse zone is resolves perfectly per RFC ?
> they go through the motions, but don't deliver the mail to the end user.
This is "accept-and-drop" policy is particularly sinister since bona
fida mail servers, not seeing a reject, think delivery succeeded.
>When we changed IP's we had the same problem for about a week until
>their DNS servers reflected the change.
You had a TTL of 1 week on your RR's??
I bet they run BIND unmodified:
# dig @DNS-01.NS.aol.com txt chaos version.bind.
; <<>> DiG 8.2 <<>> @DNS-01.NS.aol.com txt chaos version.bind.
; (1 server found)
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUERY SECTION:
;; version.bind, type = TXT, class = CHAOS
;; ANSWER SECTION:
VERSION.BIND. 0S CHAOS TXT "Sorry, not today."
Len
http://BIND8NT.MEIway.com : Binary for ISC BIND 8.2.3 for NT4 & W2K
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