We are currently losing some e-mail and we discovered that this is caused by a wrong DNS setting. We used a CNAME for our MX record an thats not allowed. So about 2 weeks ago we changed it to an A-record to fix the problem.
It seems all major DNS services (like OpenDNS and ISPs) have synced their records and are returning correct results on our DNS queries. But Googles DNS service (at 8.8.8.8) is still returning the CNAME values and we still some e-mails are not delivered correctly.
Query on OpenDNS:
; <<>> DiG 9.7.3-P3 <<>> mx wrep.nl @208.67.222.222
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51231
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;wrep.nl. IN MX
;; ANSWER SECTION:
wrep.nl. 3595 IN MX 10 druif.wrep.nl.
;; Query time: 21 msec
;; SERVER: 208.67.222.222#53(208.67.222.222)
;; WHEN: Fri Nov 25 21:36:58 2011
;; MSG SIZE rcvd: 47
Query on Google DNS:
; <<>> DiG 9.7.3-P3 <<>> mx wrep.nl @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12124
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;wrep.nl. IN MX
;; ANSWER SECTION:
wrep.nl. 2372 IN CNAME druif.wrep.nl.
;; AUTHORITY SECTION:
wrep.nl. 572 IN SOA ns0.freshdns.nl. hostmaster.twilightinc.nl. 2011112401 14400 3600 604800 3600
;; Query time: 94 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Fri Nov 25 21:38:10 2011
;; MSG SIZE rcvd: 117
So is there anyone who can explain why Google is responding with a different (incorrect) result two weeks after the last change? And how can we get Google to update their DNS records correctly? Any help is very appreciated.
(Please note that other domains that are managed by the same DNS servers/tools are working fine.)
