> We will need to change our MX IP Address due to a change in ISP.
My
> question is how can we assure that this IP Address change gets
> propagated throughout the DNS system so that disruption to email
is
> limited. Any advice is appreciated.
bind 8.2.3 on linux
and
imail on nt
edit your zone file
add your new ip adress to the mx entry see below
increment the serial of your zonefile
example
$TTL 1D
@ IN SOA ns1local.xxx.at. support.xxx.at. (
2001010403
8H
2H
4W
1D)
IN NS ns1local.peopleatwork.at.
IN MX 5 mailold.xxx.at.
IN MX 10 mailnew.xxx.at.
ns1local IN A 192.168.66.2
mailnew IN A 192.168.66.3
mailold IN A 192.168.66.4
and now restart your nameserver!
make a check with some kind of nslookup on an foreign nameserver to
look if the info got around!
if the info is published (after restarting bind) switch the ip!
under linux use dig, or use a nslookup but be sure not to get a
cached information!
if you use win nt, possibly you have to restart your computer or to
disable the network to get the cached information out!
now all mails are going to be send in the circle between 5 and 10.
so if you change your mailservers ip from 4 to 3 the time you switch
it on your mailserver gets them with the ip 4!
and after one or two days cut the old mx out of your dns zonefile!
dont forget the serial and restart it!
That would be the way i make it! of cource be aware not to have
another maildaemon running on your old ip after switching your Imail
Server to the new one!
marco
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/
