>Does anyone have a working example of a DNS/MX entry where more than one
>domain is on a mail server with one IP?
@ MX 10 mail.domain.com.
mail MX 10 mail.domain.com.
Note that the host field (the right side hostname) does not have to
be the same domain as the the zone file.
ex:
;file: db.mydomain.com
@ MX 10 mail.ISPdomain.com.
mail MX 10 mail.ISPdomain.com.
So if you had 1000 virtual domains on Imail on one ip, they could all
share the same preceding MX records. And since all your zones also
shares the same NS records, you could, with BIND8, use $INCLUDE to
pull in a common file containing the 2 common MX records and the 2
common NS records.
And guess which hostname you would use in the reverse zone? :
ip PTR mail.ISPdomain.com.
There may be some advantage that recommends that the
mail.ISPdomain.com hostname be the Imail default/canonical hostname for the ip.
>Also, how many records will IMail grab in the reverse zone??
See RFC 1034 1035, then somewhat confused by RFC 2181:
----
10.2. PTR records
Confusion about canonical names has lead to a belief that a PTR
record should have exactly one RR in its RRSet. This is incorrect,
the relevant section of RFC1034 (section 3.6.2) indicates that the
value of a PTR record should be a canonical name. That is, it should
not be an alias. There is no implication in that section that only
one PTR record is permitted for a name. No such restriction should
be inferred.
But almost no apps or resolvers (aka DNS clients) will return or use
more that one PTR record.
Len
http://BIND8NT.MEIway.com : Binary for ISC BIND 8.2.3 for NT4 & W2K
http://IMGate.MEIway.com : Build free, hi-perf, anti-spam mail gateways
Please visit http://www.ipswitch.com/support/mailing-lists.html
to be removed from this list.
An Archive of this list is available at:
http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
