rDNS problem ?
Mark Andrews
Mark_Andrews at isc.org
Mon Jul 30 22:14:14 UTC 2007
> 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
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