CNAME for MX Record?

Bradley Caricofe brad at
Wed Aug 19 16:35:44 UTC 2009

Hey list,

I have the following issue. A customer hosts a domain with me, Her primary email account is on that domain, we'll call
it her at She has also registered another name through
Dotster, Dotster provides her with URL
redirection and email forwarding for that domain. She has setup an
email address, we'll call it her at, which
should forward to her at

We've been having a problem where not all senders are being received
when mail is sent to the her at account. I've
sent her test emails from gmail, yahoo and my own server (sendmail)
and all were received. When I send emails from systems using exchange,
I eventually get a bounce that the message has been's
never received.

When I do digs for the MX record for I get a CNAME:

[root at jump1 ~]# dig MX

; <<>> DiG 9.3.4-P1 <<>> MX
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 5373
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;     IN      MX


;; AUTHORITY SECTION:            600     IN      SOA 2009051400 10800 3600 604800 600

;; Query time: 233 msec
;; WHEN: Wed Aug 19 04:44:21 2009
;; MSG SIZE  rcvd: 139


If I do digs against her actual nameservers, I get a correct MX
record. What the heck am I seeing here and is this the likely cause of
the delayed emails?


More information about the bind-users mailing list