[qmailtoaster] Cname Lookup Failed Temporarily - Patch Solution
Hello, I have been recently realized a problem / BUG common to so far 3 qmail toaster installs, that of the dreaded: --- CNAME lookup failed temporarily. (#4.4.3) I'm not going to try again; this message has been in the queue too long. --- found at /var/log/qmail/send/current It happens when I send email to a particular client. Their domain dns is hosted by 1and1 Germany. I found this error consistent with my 2 other qmailtoaster installs. But no error with my postfix and exim servers. I have come to the conclusion that maybe qmailtoaster needs patching. That maybe our current qmailtoaster in Centos5 needs patching. In the document: https://www.webfactory.de/blog/patch-qmail-in-ubuntu-to-avoid-cname-lookup-failed-temporarily-errors It says: qmail itself has a problem with these large DNS replies as it was designed to handle packets not over 512 byte in size. So, when connecting to a site, it might fail with the misleading message CNAME lookup failed temporarily. (#4.4.3), defer message delivery and eventually time out. I have tried installing bind properly to no avail. --- My request is to fix qmailtoaster so it can handle these large DNS replies as stated in the document above. Who will be tapped to do it? And maybe we can all chip in and make this fix happen an fast. Best wishes, Edwin
Re: [qmailtoaster] Cname Lookup Failed Temporarily - Patch Solution
Hi, Do you run your own DNS caching server? If not try using dnsmasq, simple to install and configure. It might solve your issue as I cannot find that response in my logs. best wishes Tony White On 27/03/2015 04:59, Edwin C wrote: Hello, I have been recently realized a problem / BUG common to so far 3 qmail toaster installs, that of the dreaded: --- CNAME lookup failed temporarily. (#4.4.3) I'm not going to try again; this message has been in the queue too long. --- found at /var/log/qmail/send/current It happens when I send email to a particular client. Their domain dns is hosted by 1and1 Germany. I found this error consistent with my 2 other qmailtoaster installs. But no error with my postfix and exim servers. I have come to the conclusion that maybe qmailtoaster needs patching. That maybe our current qmailtoaster in Centos5 needs patching. In the document: https://www.webfactory.de/blog/patch-qmail-in-ubuntu-to-avoid-cname-lookup-failed-temporarily-errors It says: qmail itself has a problem with these large DNS replies as it was designed to handle packets not over 512 byte in size. So, when connecting to a site, it might fail with the misleading message | CNAME lookup failed temporarily. (#4.4.3)|, defer message delivery and eventually time out. I have tried installing bind properly to no avail. --- My request is to fix qmailtoaster so it can handle these large DNS replies as stated in the document above. Who will be tapped to do it? And maybe we can all chip in and make this fix happen an fast. Best wishes, Edwin
RE: [qmailtoaster] Cname Lookup Failed Temporarily - Patch Solution
I am running bind caching-nameserver. I will try dnsmasq. Temporarily I have resorted to using external smtp servers via smtproutes Just last night, one qmailtoaster #1 I installed caching-nameserver started working when I purged the dns cache. But the other qmailtoaster #2 still has the cname lookup failed temporarily error. I will try dnsmasq. Thank you for the clue. Date: Fri, 27 Mar 2015 11:11:04 +1100 From: t...@ycs.com.au To: qmailtoaster-list@qmailtoaster.com Subject: Re: [qmailtoaster] Cname Lookup Failed Temporarily - Patch Solution Hi, Do you run your own DNS caching server? If not try using dnsmasq, simple to install and configure. It might solve your issue as I cannot find that response in my logs. best wishes Tony White On 27/03/2015 04:59, Edwin C wrote: Hello, I have been recently realized a problem / BUG common to so far 3 qmail toaster installs, that of the dreaded: --- CNAME lookup failed temporarily. (#4.4.3) I'm not going to try again; this message has been in the queue too long. --- found at /var/log/qmail/send/current It happens when I send email to a particular client. Their domain dns is hosted by 1and1 Germany. I found this error consistent with my 2 other qmailtoaster installs. But no error with my postfix and exim servers. I have come to the conclusion that maybe qmailtoaster needs patching. That maybe our current qmailtoaster in Centos5 needs patching. In the document: https://www.webfactory.de/blog/patch-qmail-in-ubuntu-to-avoid-cname-lookup-failed-temporarily-errors It says: qmail itself has a problem with these large DNS replies as it was designed to handle packets not over 512 byte in size. So, when connecting to a site, it might fail with the misleading message CNAME lookup failed temporarily. (#4.4.3), defer message delivery and eventually time out. I have tried installing bind properly to no avail. --- My request is to fix qmailtoaster so it can handle these large DNS replies as stated in the document above. Who will be tapped to do it? And maybe we can all chip in and make this fix happen an fast. Best wishes, Edwin
