Hey List! I am currently getting this error message when trying to send a mail to a domain (audi-kiel.de). I Googled and figured out that it’s caused by Qmail not handling the ANY DNS request properly when exceeding 512 bytes in answers. Strangely this was linked to a DNS patch in Qmail but when I checked my Source RPM this patch was applied properly. I even tried re-compiling it and re-installing the package to no avail.
Does anyone else have a hint why this seems to be an issue? I haven’t had problems so far and this only started recently for that domain. Things I checked: * DNS Server Settings, I ran against Google DNS and my Host Provider DNS, both causing this * Qmail Patches, they are all applied and I can see the changes in source code being correct for large DNS responses * Restart Qmail, put in for good measure but of course I did that too (including killing processes) Full error message: CNAME lookup failed temporarily. (#4.4.3) I'm not going to try again; this message has been in the queue too long. I am starting to think this is actually caused by a DNS issue on their end and not my end: $ dig mx audi-kiel.de […] ;; QUESTION SECTION: ;audi-kiel.de. IN MX ;; ANSWER SECTION: audi-kiel.de. 1937 IN MX 100 mail2.kct-gruppe.de. audi-kiel.de. 1937 IN MX 10 mail1.onecloud.direct. […] $ dig cname audi-kiel.de […] ;; QUESTION SECTION: ;audi-kiel.de. IN CNAME ;; AUTHORITY SECTION: audi-kiel.de. 599 IN SOA ns3.kundenserver.de. hostmaster.kundenserver.de. 2016032102 28800 7200 604800 600 […] If you all agree on this I will get in touch with them to get this fixed. Maybe they moved their mail hosting recently which would explain those weird MX records :-) Cheers, Sebastian
