rDNS problem ?

[Mark Andrews]

> I host an apache server with multiple low-volume family web-sites for mail 
> and family pictures, etc.
> I thought I had everything squared away for the last year or so, but my 
> youngest is trying to reply to craigslist here in the San Francisco area 
> and gets a returned mail message:
> 
>                         The Postfix program
> 
> <comm-380120213 at craigslist.org>: host mxi4s.craigslist.org[66.150.243.11] 
> said:
>     554 <unknown[66.124.156.123]>: Client host rejected: rDNS/DNS 
> validation
>     failed. Please setup matching DNS and rDNS records:
>     http://bind8nt.meiway.com/itsaDNSmess.cfm (in reply to RCPT TO 
> command)
> 
> Is it really DNS or do I go looking at my postfix configuration? 
> version.bind    text = "9.2.4"
> 
> He is sending from username at hall-brothers.com, and mail should be handled 
> by mail.light-family.com
> 
> Where do I go looking?

	I suggest that you make sure that *every* PTR record has a
	corresponding A record or that the PTR record is removed.

	Mark

drugs:marka 08:09 {417} % dig -x 66.124.156.123
;; Truncated, retrying in TCP mode.

; <<>> DiG 9.3.4 <<>> -x 66.124.156.123
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37725
;; flags: qr rd ra; QUERY: 1, ANSWER: 19, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;123.156.124.66.in-addr.arpa.   IN      PTR

;; ANSWER SECTION:
123.156.124.66.in-addr.arpa. 7199 IN    CNAME   123.120.156.124.66.in-addr.arpa.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   hysl.org.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   mail.light-family.com.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   valrey.net.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   cakables.com.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   miss-light.com.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   abcshirtusa.com.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   siteviewing.com.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   siteviewing.net.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   soccer-mail.com.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   abcshirtsusa.com.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   light-family.com.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   showshirtusa.com.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   hall-brothers.com.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   nopeakerplant.com.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   showshirtsusa.com.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   friedrich-family.com.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   www.light-family.com.
123.120.156.124.66.in-addr.arpa. 86400 IN PTR   dns1.light-family.com.

;; Query time: 12 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jul 31 08:10:08 2007
;; MSG SIZE  rcvd: 520

drugs:marka 08:10 {418} % dig hysl.org | grep 66.124.156.123
drugs:marka 08:10 {419} % dig mail.light-family.com | grep 66.124.156.123
mail.light-family.com.  7200    IN      A       66.124.156.123
drugs:marka 08:10 {420} % dig valrey.net | grep 66.124.156.123
drugs:marka 08:11 {421} % dig cakables.com | grep 66.124.156.123
drugs:marka 08:11 {422} % dig miss-light.com | grep 66.124.156.123
miss-light.com.         7200    IN      A       66.124.156.123
drugs:marka 08:11 {423} % dig abcshirtusa.com | grep 66.124.156.123
drugs:marka 08:11 {424} % 
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org