On 02/05/2013 04:10 PM, Ed Morrison wrote:
On 2/5/2013 2:48 PM, Eric Shubert wrote:
On 02/05/2013 03:22 PM, Ed Morrison wrote:
Hi:
I am running QmailToaster and have been for many years. Recently (the
last month), I have been receiving these errors:
deferral: CNAME_lookup_failed_temporarily._(#4.4.3)/
<snip>
In addition I have changed out DNS programs on the mail server to
try to help i.e.
caching-nameserver
pdns-recursor
djbdns (rbldnsd)
Currently, I have DNS lookups pointed to a Windows DNS server with the
same issue. Doing a dig or nslookup on the mx records shows a valid
mx record.
Does anyone have an idea as to the problem?
Thanks,
Ed
You remembered to change your /etc/resolv.conf file with these
resolvers, right?
(nameserver 127.0.0.1)
I recommend using pdns-recursor, installed on the QMT host. PowerDNS
is a modern, efficient, well maintained resolver. If that has an issue
resolving something, the problem is likely with the target domain's
DNS records.
Hi Eric:
Yes, I did change the resolv.conf to to reflect only the 127.0.0.1.
But Dig works for the domains see below:
[root@qmail ~]# dig mx teichert.com
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.6 <<>> mx teichert.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 14358
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1
;; QUESTION SECTION:
;teichert.com. IN MX
;; ANSWER SECTION:
teichert.com. 3600 IN MX 10
mailgw3.ppt.questsys.com.
teichert.com. 3600 IN MX 10
mailgw4.ppt.questsys.com.
teichert.com. 3600 IN MX 10
mailgw1.ppt.questsys.com.
teichert.com. 3600 IN MX 10
mailgw2.ppt.questsys.com.
;; ADDITIONAL SECTION:
mailgw3.ppt.questsys.com. 3600 IN A 208.67.178.50
;; Query time: 196 msec
;; SERVER: 192.168.1.6#53(192.168.1.6)
;; WHEN: Tue Feb 5 15:16:23 2013
;; MSG SIZE rcvd: 155
[root@qmail ~]# dig mx blm.gov
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.6 <<>> mx blm.gov
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16497
;; flags: qr aa; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 8
;; QUESTION SECTION:
;blm.gov. IN MX
;; ANSWER SECTION:
blm.gov. 300 IN MX 5 mail5.blm.gov.
blm.gov. 300 IN MX 5 mail4.blm.gov.
;; AUTHORITY SECTION:
blm.gov. 86400 IN NS blmdns2.blm.gov.
blm.gov. 86400 IN NS blmdns1.blm.gov.
;; ADDITIONAL SECTION:
mail4.blm.gov. 600 IN A 204.124.92.27
mail4.blm.gov. 600 IN AAAA 2001:49c8:8004:20fc::92:27
mail5.blm.gov. 600 IN A 204.124.92.28
mail5.blm.gov. 600 IN AAAA 2001:49c8:8004:20fc::92:28
blmdns1.blm.gov. 86400 IN A 204.124.92.8
blmdns1.blm.gov. 86400 IN AAAA 2001:49c8:8004:20fc::92:8
blmdns2.blm.gov. 86400 IN A 204.124.93.8
blmdns2.blm.gov. 86400 IN AAAA 2001:49c8:8004:20fc::93:8
;; Query time: 59 msec
;; SERVER: 192.168.1.6#53(192.168.1.6)
;; WHEN: Tue Feb 5 15:17:21 2013
;; MSG SIZE rcvd: 289
[root@qmail ~]# dig mx tahoe.ca.gov
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.6 <<>> mx tahoe.ca.gov
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56341
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 2
;; QUESTION SECTION:
;tahoe.ca.gov. IN MX
;; ANSWER SECTION:
tahoe.ca.gov. 6238 IN MX 10
mail.messaging.microsoft.com.
;; ADDITIONAL SECTION:
mail.messaging.microsoft.com. 60 IN A 216.32.181.178
mail.messaging.microsoft.com. 60 IN A 65.55.88.22
;; Query time: 75 msec
;; SERVER: 192.168.1.6#53(192.168.1.6)
;; WHEN: Tue Feb 5 15:17:47 2013
;; MSG SIZE rcvd: 106
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Ok. So I'm guessing that since these domains don't have any CNAME
records, that the failure is with some other domain's lookup.
I take it that the log messages in question are in the send log?
Does this happen only with certain domains, or across the board?
I don't know qmail-remote in depth, but is it perhaps checking the
sender's domain and choking on that?
--
-Eric 'shubes'
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