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Re: How badly have I screwed up?

From: Len Conrad
Date: Friday, January 4, 2002
Time: 3:27:21 pm


>On 1/4/02 3:09 AM, Men & Mice Support wrote:
>
> >lists.officemedic.net. MX 10 lists.officemedic.net.
> >lists.officemedic.net. A <IP address of list server>
>
>This now gives me *two* MX records for this zone

what? internet only sees one:

; <<>> DiG 8.3 <<>> lists.officemedic.net mx
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3
;; QUERY SECTION:
;; lists.officemedic.net, type = MX, class = IN

;; ANSWER SECTION:
lists.officemedic.net. 1H IN MX 10 lists.officemedic.net.

;; AUTHORITY SECTION:
officemedic.net. 1H IN NS ns2.officemedic.net.
officemedic.net. 1H IN NS ns1.officemedic.net.

;; ADDITIONAL SECTION:
lists.officemedic.net. 1H IN A 12.39.138.244
ns2.officemedic.net. 1H IN A 12.39.138.144
ns1.officemedic.net. 1H IN A 12.39.138.244


> and a DNS query shows
>lists.officemedic.net as the primary mail server for this zone. That's
>not correct...or is it?

hey, it's YOUR zone, make the MX hostname whatever you want. :))

but there's no MX for officemedic.net:
Opt-In4Email# dig officemedic.net mx

; <<>> DiG 8.3 <<>> officemedic.net mx
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUERY SECTION:
;; officemedic.net, type = MX, class = IN


look, it's REALLY simple:

make a hostname:

mx.officemedic.net A ip.ad.re.ss

then make the MX records:

officemedic.net. mx 10 mx.officemedic.net.
mx.officemedic.net. mx 10 mx.officemedic.net.

if your server is on same ip, then also:

lists.officemedic.net. mx 10 mx.officemedic.net.

concept: MX only tells internet to which ip to send mail for a given domain.

Len


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