Mark Lowes wrote:
> On Tue, 2003-07-01 at 02:39, Suresh Ramasubramanian wrote:
>
>>Why should you care if forward DNS doesn't match rDNS by the way?
>
>
> As a metric of a well run system checking that there is consistency in
> the DNS/rDNS is good but this needs to be a full check where
>
> nameA --> IP --> nameB
> ^ |
> +------+
>
> where nameA and nameB are not necessarily identical but given the number
> of badly run sites out there you'll throw a lot of good email away with
> this check.
This is perfectly ok.
Greg seems to require that name A == name B == HELO, from what I can see
2003-07-01 13:58:30 19XGTa-000FpQ-FP ** woods@??? R=dnslookup
T=remote_smtp: SMTP error from remote mailer after HELO
frodo.hserus.net: host mail.weird.com [204.92.254.2]: 501-fatal error
while validating 'HELO' host name 'frodo.hserus.net'.\n501-connection
rejected from 202-77-223-48.outblaze.com remote address
[202.77.223.48].\n501-Reason given was:\n501- No reverse DNS PTR for
the remote address [202.77.223.48] has a\n501 hostname matching
'frodo.hserus.net'
frodo.hserus.net. 23h57m42s IN A 202.77.223.48
48.223.77.202.in-addr.arpa. 57m46s IN PTR 202-77-223-48.outblaze.com.
The rDNS does point right back to frodo.hserus.net
So I can't send him mail. Oh well - that's life.
srs
