RE: [qmailtoaster] Re: Problem sending mail to comcast.net
By late afternoon emails to Comcast.net started going out . The only change was installing pdns-recursor earlier in the day . Does pdns-recursor take awhile to start working ? Much thanks for everyone's help. Rick -Original Message- From: Eric Shubert [mailto:e...@shubes.net] Sent: Thursday, December 13, 2012 10:15 PM To: qmailtoaster-list@qmailtoaster.com Subject: [qmailtoaster] Re: Problem sending mail to comcast.net When I dig comcast.net using pdns, the reply is much smaller than when using bind. Bind returns very close to 512 bytes, while pdns is just under 100 bytes. This is true when using -t MX as well (which is what I expect qmail is doing). Replies from pdns are *much* smaller, so it appears that pdns is running ok. I'm not seeing any cname records. Can you poke around and see what might be causing a cname lookup of some sort? -- -Eric 'shubes' On 12/13/2012 09:46 AM, rvau...@libertycasting.com wrote: This is what I get when I dig comcast.net [root@mail1 pdns-recursor]# dig comcast.net ; DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.5 comcast.net ;; global options: printcmd ;; Got answer: ;; -HEADER- opcode: QUERY, status: NOERROR, id: 15929 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;comcast.net. IN A ;; ANSWER SECTION: comcast.net. 2530IN A 207.223.8.109 comcast.net. 2530IN A 76.96.39.101 comcast.net. 2530IN A 207.223.8.110 comcast.net. 2530IN A 76.96.39.102 ;; Query time: 0 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Thu Dec 13 11:39:38 2012 ;; MSG SIZE rcvd: 93 html head meta content=text/html; charset=ISO-8859-1 http-equiv=Content-Type /head body bgcolor=#FF text=#00 Have you done any DNS testing to see if comcast.net resolves?br br br div class=moz-cite-prefixOn 12/13/2012 04:53 AM, Rvaught wrote:br /div blockquote cite=mid:007a01cdd930$e94b0d80$bbe12880$@com type=cite pre wrap=My resolv.conf has : Search libertycasting.com Nameserver 192.168.120.20 ( this local a network dns forwarder) I still have bind installed . I think on my old server I was running the tinydns. I installed pdns-recursor package Still have same problem -Original Message- From: Eric Shubert [a class=moz-txt-link-freetext href=mailto:e...@shubes.net;mailto:e...@shubes.net/a] Sent: Wednesday, December 12, 2012 1:17 PM To: a class=moz-txt-link-abbreviated href=mailto:qmailtoaster-list@qmailtoaster.com;qmailtoaster-list@qmailtoas ter.com/a Subject: [qmailtoaster] Re: Problem sending mail to comcast.net On 12/12/2012 11:00 AM, Rvaught wrote: /pre blockquote type=cite pre wrap=Since I have set up my new QMT server I am having trouble sending mail to this domain. This is the error I receive: lt;a class=moz-txt-link-abbreviated href=mailto:chlevi...@comcast.net;chlevi...@comcast.net/a a class=moz-txt-link-rfc2396E href=mailto:chlevi...@comcast.net;lt;mailto:chlevi...@comcast.netgt;/a gt;: CNAME lookup failed temporarily. (#4.4.3) I'm not going to try again; this message has been in the queue too long. Not sure about what I need to adjust. I also like to thank everyone for help on previous problems. Rick Liberty Casting /pre /blockquote pre wrap= What are you using for a DNS resolver? (cat /etc/resolv.conf) I recommend using the pdns-recursor package. It's available via yum from the centos repos. -- -Eric 'shubes' - To unsubscribe, e-mail: a class=moz-txt-link-abbreviated href=mailto:qmailtoaster-list-unsubscr...@qmailtoaster.com;qmailtoaster-li st-unsubscr...@qmailtoaster.com/a For additional commands, e-mail: a class=moz-txt-link-abbreviated href=mailto:qmailtoaster-list-h...@qmailtoaster.com;qmailtoaster-list-help @qmailtoaster.com/a - To unsubscribe, e-mail: a class=moz-txt-link-abbreviated href=mailto:qmailtoaster-list-unsubscr...@qmailtoaster.com;qmailtoaster-li st-unsubscr...@qmailtoaster.com/a For additional commands, e-mail: a class=moz-txt-link-abbreviated href=mailto:qmailtoaster-list-h...@qmailtoaster.com;qmailtoaster-list-help @qmailtoaster.com/a /pre /blockquote br div class=moz-signature-- br img src=cid:part1.01030605.00020307@yother.com border=0/div /body /html - To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com - To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional
RE: [qmailtoaster] Re: Problem sending mail to comcast.net
My resolv.conf has : Search libertycasting.com Nameserver 192.168.120.20 ( this local a network dns forwarder) I still have bind installed . I think on my old server I was running the tinydns. I installed pdns-recursor package Still have same problem -Original Message- From: Eric Shubert [mailto:e...@shubes.net] Sent: Wednesday, December 12, 2012 1:17 PM To: qmailtoaster-list@qmailtoaster.com Subject: [qmailtoaster] Re: Problem sending mail to comcast.net On 12/12/2012 11:00 AM, Rvaught wrote: Since I have set up my new QMT server I am having trouble sending mail to this domain. This is the error I receive: chlevi...@comcast.net mailto:chlevi...@comcast.net: CNAME lookup failed temporarily. (#4.4.3) I'm not going to try again; this message has been in the queue too long. Not sure about what I need to adjust. I also like to thank everyone for help on previous problems. Rick Liberty Casting What are you using for a DNS resolver? (cat /etc/resolv.conf) I recommend using the pdns-recursor package. It's available via yum from the centos repos. -- -Eric 'shubes' - To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com - To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
Re: [qmailtoaster] Re: Problem sending mail to comcast.net
Have you done any DNS testing to see if comcast.net resolves? On 12/13/2012 04:53 AM, Rvaught wrote: My resolv.conf has : Search libertycasting.com Nameserver 192.168.120.20 ( this local a network dns forwarder) I still have bind installed . I think on my old server I was running the tinydns. I installed pdns-recursor package Still have same problem -Original Message- From: Eric Shubert [mailto:e...@shubes.net] Sent: Wednesday, December 12, 2012 1:17 PM To: qmailtoaster-list@qmailtoaster.com Subject: [qmailtoaster] Re: Problem sending mail to comcast.net On 12/12/2012 11:00 AM, Rvaught wrote: Since I have set up my new QMT server I am having trouble sending mail to this domain. This is the error I receive: chlevi...@comcast.net mailto:chlevi...@comcast.net: CNAME lookup failed temporarily. (#4.4.3) I'm not going to try again; this message has been in the queue too long. Not sure about what I need to adjust. I also like to thank everyone for help on previous problems. Rick Liberty Casting What are you using for a DNS resolver? (cat /etc/resolv.conf) I recommend using the pdns-recursor package. It's available via yum from the centos repos. -- -Eric 'shubes' - To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com - To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com --
Re: [qmailtoaster] Re: Problem sending mail to comcast.net
This is what I get when I dig comcast.net [root@mail1 pdns-recursor]# dig comcast.net ; DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.5 comcast.net ;; global options: printcmd ;; Got answer: ;; -HEADER- opcode: QUERY, status: NOERROR, id: 15929 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;comcast.net. IN A ;; ANSWER SECTION: comcast.net. 2530 IN A 207.223.8.109 comcast.net. 2530 IN A 76.96.39.101 comcast.net. 2530 IN A 207.223.8.110 comcast.net. 2530 IN A 76.96.39.102 ;; Query time: 0 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Thu Dec 13 11:39:38 2012 ;; MSG SIZE rcvd: 93 html head meta content=text/html; charset=ISO-8859-1 http-equiv=Content-Type /head body bgcolor=#FF text=#00 Have you done any DNS testing to see if comcast.net resolves?br br br div class=moz-cite-prefixOn 12/13/2012 04:53 AM, Rvaught wrote:br /div blockquote cite=mid:007a01cdd930$e94b0d80$bbe12880$@com type=cite pre wrap=My resolv.conf has : Search libertycasting.com Nameserver 192.168.120.20 ( this local a network dns forwarder) I still have bind installed . I think on my old server I was running the tinydns. I installed pdns-recursor package Still have same problem -Original Message- From: Eric Shubert [a class=moz-txt-link-freetext href=mailto:e...@shubes.net;mailto:e...@shubes.net/a] Sent: Wednesday, December 12, 2012 1:17 PM To: a class=moz-txt-link-abbreviated href=mailto:qmailtoaster-list@qmailtoaster.com;qmailtoaster-list@qmailtoaster.com/a Subject: [qmailtoaster] Re: Problem sending mail to comcast.net On 12/12/2012 11:00 AM, Rvaught wrote: /pre blockquote type=cite pre wrap=Since I have set up my new QMT server I am having trouble sending mail to this domain. This is the error I receive: lt;a class=moz-txt-link-abbreviated href=mailto:chlevi...@comcast.net;chlevi...@comcast.net/a a class=moz-txt-link-rfc2396E href=mailto:chlevi...@comcast.net;lt;mailto:chlevi...@comcast.netgt;/agt;: CNAME lookup failed temporarily. (#4.4.3) I'm not going to try again; this message has been in the queue too long. Not sure about what I need to adjust. I also like to thank everyone for help on previous problems. Rick Liberty Casting /pre /blockquote pre wrap= What are you using for a DNS resolver? (cat /etc/resolv.conf) I recommend using the pdns-recursor package. It's available via yum from the centos repos. -- -Eric 'shubes' - To unsubscribe, e-mail: a class=moz-txt-link-abbreviated href=mailto:qmailtoaster-list-unsubscr...@qmailtoaster.com;qmailtoaster-list-unsubscr...@qmailtoaster.com/a For additional commands, e-mail: a class=moz-txt-link-abbreviated href=mailto:qmailtoaster-list-h...@qmailtoaster.com;qmailtoaster-list-h...@qmailtoaster.com/a - To unsubscribe, e-mail: a class=moz-txt-link-abbreviated href=mailto:qmailtoaster-list-unsubscr...@qmailtoaster.com;qmailtoaster-list-unsubscr...@qmailtoaster.com/a For additional commands, e-mail: a class=moz-txt-link-abbreviated href=mailto:qmailtoaster-list-h...@qmailtoaster.com;qmailtoaster-list-h...@qmailtoaster.com/a /pre /blockquote br div class=moz-signature-- br img src=cid:part1.01030605.00020307@yother.com border=0/div /body /html
Re: [qmailtoaster] Re: Problem sending mail to comcast.net
I found this in the archives. All of the senders experiencing the bounced messages mentioning cname lookup failure appear to be running the qmail mail server software. Qmail, if not using a third party patch that was written in the late 90's, has an issue sending to domains whose name servers respond to DNS queries of type "ANY" with more than 512 bytes of data; that is a bug in qmail and the author has never fixed it because he wants you to use his DNS server software which also eliminates the issue in a different way. Google's name servers do respond to queries of type "ANY" with more than 512 bytes of data, so when an unpatched qmail server tries to send an email to a domain whose lowest cost MX record ends in .google.com, qmail is going to do a DNS query of type ANY against one ofgoogle.com's authoritative name servers, get back more than it can correctly handle and defer repeatedly until ultimately bouncing the message with that cname lookup failure. http://productforums.google.com/forum/#!category-topic/apps/mail-settings/mIGTQVZiFxo Can anyone confirm that Qmailtoaster has been patched with this patch - http://www.ckdhr.com/ckd/qmail-103.patch??? http://www.memoryhole.net/qmail/#oversize-dns On 12/13/2012 08:46 AM, rvau...@libertycasting.com wrote: This is what I get when I dig comcast.net [root@mail1 pdns-recursor]# dig comcast.net ; DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.5 comcast.net ;; global options: printcmd ;; Got answer: ;; -HEADER- opcode: QUERY, status: NOERROR, id: 15929 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;comcast.net. IN A ;; ANSWER SECTION: comcast.net. 2530 IN A 207.223.8.109 comcast.net. 2530 IN A 76.96.39.101 comcast.net. 2530 IN A 207.223.8.110 comcast.net. 2530 IN A 76.96.39.102 ;; Query time: 0 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Thu Dec 13 11:39:38 2012 ;; MSG SIZE rcvd: 93 html head meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type" /head body bgcolor="#FF" text="#00" Have you done any DNS testing to see if comcast.net resolves?br br br div class="moz-cite-prefix"On 12/13/2012 04:53 AM, Rvaught wrote:br /div blockquote cite="" type="cite" pre wrap=""My resolv.conf has : Search libertycasting.com Nameserver 192.168.120.20 ( this local a network dns forwarder) I still have bind installed . I think on my old server I was running the tinydns. I installed pdns-recursor package Still have same problem -Original Message- From: Eric Shubert [a class="moz-txt-link-freetext" href="" class="moz-txt-link-rfc2396E" href="mailto:e...@shubes.net">"mailto:e...@shubes.net"mailto:e...@shubes.net/a] Sent: Wednesday, December 12, 2012 1:17 PM To: a class="moz-txt-link-abbreviated" href="" class="moz-txt-link-rfc2396E" href="mailto:qmailtoaster-list@qmailtoaster.com">"mailto:qmailtoaster-list@qmailtoaster.com"qmailtoaster-list@qmailtoaster.com/a Subject: [qmailtoaster] Re: Problem sending mail to comcast.net On 12/12/2012 11:00 AM, Rvaught wrote: /pre blockquote type="cite" pre wrap=""Since I have set up my new QMT server I am having trouble sending mail to this domain. This is the error I receive: lt;a class="moz-txt-link-abbreviated" href="" class="moz-txt-link-rfc2396E" href="mailto:chlevi...@comcast.net">"mailto:chlevi...@comcast.net"chlevi...@comcast.net
