I have several DNS servers and wondered if the following
record entry is properly set for all of my DNS servers:
$TTL 172800
@ IN SOA ns1.abc.com. admin.abc.com. (
1 ; serial
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum
;============ Nameserver ================
@ IN NS ns1.abc.com.
@ IN NS ns2.abc.com.
@ IN NS ns3.abc.com.
;============ Mail Exchange =============
@ IN MX 10 mail1.abc.com.
@ IN MX 20 mail2.abc.com.
@ IN MX 30 mail3.abc.com.
@ IN TXT v=spf1 a mx -all
;============ Hosts ======================
@ IN A 10.1.0.1
mail1 IN A 10.1.0.1
mail2 IN A 10.1.0.2
mail3 IN A 10.1.0.3
ns1 IN A 10.1.0.1
ns2 IN A 10.1.0.2
ns3 IN A 10.1.0.2
;========================================
In particular, I am focusing on record:
@ IN A 10.1.0.1
The reason I have set all of my DNS zones for the above record
for all of my DNS servers is because if had I set this record for the
actual localhost IP address, it appears that if I send mail on the
localhost, the localhost would receive the email I sent. For example,
sending mail to: joe@xxxxxxx would be received at the localhost instead
of being sent to mail{1,2,3}.abc.com. Worse, any localhost programs
attempting to send emails to "root@xxxxxxx" would fail to be delivered
to one of the MX list.
So, the question is, must each DNS server have it's own real IP address
in the '@' record? If so, how do I get around this?
Kind regards,
Dan
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