Re: Redundant mail server
On Sun, 13 Feb 2005, Curtis Vaughan wrote:
> Not sure whether redundant is the right word. Anyhow here's the
> We have an office in the US and overseas.
> The mailserver used by the overseas office is in the US office. Of
> course, occassionally there may be downtime for the US office. So the
> overseas office has this idea that we could set up a backup mail server
> in their office. They would then use the backup mail server should the
> server in the US office be down.
you should have 2 dns servers and 2 mail servers
dnsUS.npc-usa.com and create dnsus.npc.uk
dnsUK.npc-usa.com and create dnsUK.npc.uk
for US-based employee ..
for UK-based employee ..
configure the MTA to use the proper return addy
- you can use the same domain or different domains
( same for us.npc.uk and uk.npc.uk - sorta redundant )
- the trick is to have 2 dns servers .. one in us .. one in uk
- the trick is to use MX records for the mail server in us and in uk
MX allows emails to go to the other server if the primary one
- there is no special changes that needs to be done and everything
is already automated
if the us office goes down, everything is still working at the UK office