>20010618 063701 127.0.0.1 SMTP (484) 220
>**************************************2*0*0********2*0*0**************200**0
>***2*****0*00
.... a firewall or proxy answering your call to its smtp port
>20010618 063701 127.0.0.1 SMTP (484) >EHLO mail.compworldnet.com
>20010618 063701 127.0.0.1 SMTP (484) 500 5.5.1 Command unrecognized:
>"XXXX mail.compworldnet.com"
.... a dumb proxy or firewall that doesn�t understand EHLO but only HELO.
>20010618 063701 127.0.0.1 SMTP (484) >HELO mail.compworldnet.com
>20010618 063701 127.0.0.1 SMTP (484) 250 ftp.frickco.com Hello
>[65.66.8.21], pleased to meet you
>20010618 063701 127.0.0.1 SMTP (484) >MAIL
>FROM:<[EMAIL PROTECTED]>
>20010618 063701 127.0.0.1 SMTP (484) 250 2.1.0
><[EMAIL PROTECTED]>... Sender ok
>20010618 063701 127.0.0.1 SMTP (484) >RCPT To:<[EMAIL PROTECTED]>
>20010618 063701 127.0.0.1 SMTP (484) 450 4.7.1 <[EMAIL PROTECTED]>...
>Relaying temporarily denied. Cannot resolve PTR record for 65.66.8.21
this is the firewall doing DNS validations, here a reverse lookup on your
mailserver�s ip address, looking for delegation or a PTR record. look here:
mgw1# dig -x 65.66.8.21
; <<>> DiG 8.3 <<>> -x
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 4
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUERY SECTION:
;; 21.8.66.65.in-addr.arpa, type = ANY, class = IN
using bad reverse as a restriction is really dumb, but try to fix your
reverse anyway. You have to be able to send to dumb@ass people, too.
Len
http://MenAndMice.com/DNS-training
http://BIND8NT.MEIway.com : ISC BIND 8.2.4 for NT4 & W2K
http://IMGate.MEIway.com : Build free, hi-perf, anti-abuse mail gateways
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