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Maximum Dns Quesry Depth Exceeded, [SOLVED]Dig +trace = "Too many lookups"

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BizOdd	Posted: Mar 11 2009, 05:54 PM
Member Group: Members Posts: 58 Member No.: 1386 Joined: 1-November 04	Hi Guys, Im trying to work out why my servers cant seem to send email to 'info@greatnorthernsnowcat.com' about 90% of the time (some do seem to sneak by occasionally) the slog error is: [PeekTime] 1236702251 : Tue, 10 Mar 2009 12:24:11 -0400 << ErrCode = -253 ErrString = Maximum DNS quesry depth exceeded ErrInfo = greatnorthernsnowcat.com Recipient domain "greatnorthernsnowcat.com" does not exist (or it has a misconfigured DNS) >> If i run the following command on my server: dig MX greatnorthernsnowcat.com +trace the dig command runs for a few seconds and comes back with: dig: too many lookups I dont know that much about DNS, could someone knowledgeable explain that error to me, so I can explain it to the domain owner (who assures me only my server has problems sending to them) Or, does anyone know a way to trick the xmail server into always sending email for greatnorthernsnowcat.com to a specified ip address and not perform and DNS queries? thanks BizOdd

BizOdd	Posted: Mar 16 2009, 08:05 PM
Member Group: Members Posts: 58 Member No.: 1386 Joined: 1-November 04	Im Getting the exact same error for purvismarine.com now also. -BizOdd

jobber_jobber	Posted: Mar 17 2009, 02:49 AM
Newbie Group: Members Posts: 19 Member No.: 1307 Joined: 13-September 04	Hi, I'm afraid it does seem to be something to do with the way your system is resolving DNS queries: if I try those commands on my server, I get this: $ dig MX greatnorthernsnowcat.com +trace ; <<>> DiG 9.4.2-P2 <<>> MX greatnorthernsnowcat.com +trace ;; global options: printcmd . 257485 IN NS F.ROOT-SERVERS.NET. . 257485 IN NS M.ROOT-SERVERS.NET. . 257485 IN NS I.ROOT-SERVERS.NET. . 257485 IN NS A.ROOT-SERVERS.NET. . 257485 IN NS K.ROOT-SERVERS.NET. . 257485 IN NS E.ROOT-SERVERS.NET. . 257485 IN NS B.ROOT-SERVERS.NET. . 257485 IN NS H.ROOT-SERVERS.NET. . 257485 IN NS J.ROOT-SERVERS.NET. . 257485 IN NS D.ROOT-SERVERS.NET. . 257485 IN NS L.ROOT-SERVERS.NET. . 257485 IN NS G.ROOT-SERVERS.NET. . 257485 IN NS C.ROOT-SERVERS.NET. ;; Received 500 bytes from xxx.xxx.xxx.xxx#53(xxx.xxx.xxx.xxx) in 17 ms com. 172800 IN NS a.gtld-servers.net. com. 172800 IN NS b.gtld-servers.net. com. 172800 IN NS c.gtld-servers.net. com. 172800 IN NS d.gtld-servers.net. com. 172800 IN NS e.gtld-servers.net. com. 172800 IN NS f.gtld-servers.net. com. 172800 IN NS g.gtld-servers.net. com. 172800 IN NS h.gtld-servers.net. com. 172800 IN NS i.gtld-servers.net. com. 172800 IN NS j.gtld-servers.net. com. 172800 IN NS k.gtld-servers.net. com. 172800 IN NS l.gtld-servers.net. com. 172800 IN NS m.gtld-servers.net. ;; Received 502 bytes from 199.7.83.42#53(L.ROOT-SERVERS.NET) in 148 ms greatnorthernsnowcat.com. 172800 IN NS ns100.webmasters.com. greatnorthernsnowcat.com. 172800 IN NS ns101.webmasters.com. ;; Received 125 bytes from 192.52.178.30#53(k.gtld-servers.net) in 38 ms greatnorthernsnowcat.com. 86400 IN MX 10 mail.greatnorthernsnowcat.com. greatnorthernsnowcat.com. 86400 IN NS ns100.webmasters.com. greatnorthernsnowcat.com. 86400 IN NS ns101.webmasters.com. ;; Received 130 bytes from 208.64.136.91#53(ns101.webmasters.com) in 135 ms $ dig MX purvismarine.com +trace ; <<>> DiG 9.4.2-P2 <<>> MX purvismarine.com +trace ;; global options: printcmd . 257463 IN NS F.ROOT-SERVERS.NET. . 257463 IN NS J.ROOT-SERVERS.NET. . 257463 IN NS D.ROOT-SERVERS.NET. . 257463 IN NS E.ROOT-SERVERS.NET. . 257463 IN NS K.ROOT-SERVERS.NET. . 257463 IN NS M.ROOT-SERVERS.NET. . 257463 IN NS H.ROOT-SERVERS.NET. . 257463 IN NS A.ROOT-SERVERS.NET. . 257463 IN NS G.ROOT-SERVERS.NET. . 257463 IN NS C.ROOT-SERVERS.NET. . 257463 IN NS I.ROOT-SERVERS.NET. . 257463 IN NS B.ROOT-SERVERS.NET. . 257463 IN NS L.ROOT-SERVERS.NET. ;; Received 500 bytes from xxx.xxx.xxx.xxx#53(xxx.xxx.xxx.xxx) in 0 ms com. 172800 IN NS C.GTLD-SERVERS.NET. com. 172800 IN NS D.GTLD-SERVERS.NET. com. 172800 IN NS E.GTLD-SERVERS.NET. com. 172800 IN NS F.GTLD-SERVERS.NET. com. 172800 IN NS G.GTLD-SERVERS.NET. com. 172800 IN NS H.GTLD-SERVERS.NET. com. 172800 IN NS I.GTLD-SERVERS.NET. com. 172800 IN NS J.GTLD-SERVERS.NET. com. 172800 IN NS K.GTLD-SERVERS.NET. com. 172800 IN NS L.GTLD-SERVERS.NET. com. 172800 IN NS M.GTLD-SERVERS.NET. com. 172800 IN NS A.GTLD-SERVERS.NET. com. 172800 IN NS B.GTLD-SERVERS.NET. ;; Received 506 bytes from 192.36.148.17#53(I.ROOT-SERVERS.NET) in 25 ms purvismarine.com. 172800 IN NS icewall.vianet.on.ca. purvismarine.com. 172800 IN NS trafficcop.pictographics.com. ;; Received 123 bytes from 192.54.112.30#53(H.GTLD-SERVERS.NET) in 33 ms purvismarine.com. 20 IN MX 20 mail2.pictographics.com. purvismarine.com. 20 IN MX 9 mail.pictographics.com. purvismarine.com. 86400 IN NS trafficcop.pictographics.com. purvismarine.com. 86400 IN NS icewall.vianet.on.ca. ;; Received 182 bytes from 205.207.184.102#53(trafficcop.pictographics.com) in 133 ms Wish I could help you with the xmail question though, but it might be better to solve your fundamental problem, rather than trying to work around it with an xmail configuration. Regards, Jobber

BizOdd	Posted: Mar 17 2009, 07:51 PM
Member Group: Members Posts: 58 Member No.: 1386 Joined: 1-November 04	Hi Jobber_Jobber thanks for the reply. Every machine ive run that query on has come back with the same 'bad' answer. I wonder if ive messed up some thing in the servers resolv.conf file? for example my server called "mail.responsivetechnology.com" has a resolv.conf file as follows: domain responsivetechnology.com nameserver 64.34.160.92 nameserver 64.34.160.76 options rotate Anyone see a problem with that? those two name servers are the hosting companies DNS servers. Regards BizOdd

jobber_jobber	Posted: Mar 18 2009, 02:38 AM
Newbie Group: Members Posts: 19 Member No.: 1307 Joined: 13-September 04	Hi, One way of seeing whether it's the DNS servers or not, is to replace the entries in resolv.conf with say the DNS servers from opendns. They are: 208.67.222.222 208.67.220.220 If you want more details go to http://www.opendns.com Hope that helps, jobber

BizOdd	Posted: Mar 18 2009, 03:41 PM
Member Group: Members Posts: 58 Member No.: 1386 Joined: 1-November 04	Hi Jobber_Jobber I changed my resolv.conf to only have those two OpenDns entries then restarted XMail, and sent a test. I got the same error again. Can you try to send a test email to : info@purvismarine.com or info@greatnorthernsnowcat.com from your XMail server, and let me know if it works for you ? thanks -BizOdd

BizOdd

Posted: Mar 18 2009, 07:36 PM

Member

Group: Members
Posts: 58
Member No.: 1386
Joined: 1-November 04

Hi All,
So ive discovered the underlying issue:
both of those domains (purvismarine.com and greatnorthernsnowcat.com)
have 2 ns records. one that works, and one that does not.

I asked the xmail Mailinglist if there was any way to bypass XMail's DNS lookups
and Francis had the solution for me:

QUOTE

- Get greatnorthernsnowcat.com mx ip (current mx seems to be mail.greatnorthernsnowcat.com, at ip 208.64.136.91)
- In xmail smtpfwd.tab file add a line like this :

"greatnorthernsnowcat.com"[TAB]"208.64.136.91:25"

That's all

Worked like a charm.

Also, FYI: found the DNS info at: www.howismydns.com

-BizOdd

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