Koozali.org: home of the SME Server

Legacy Forums => General Discussion (Legacy) => Topic started by: jroul on December 02, 2004, 01:25:54 PM

Title: 2 mail servers
Post by: jroul on December 02, 2004, 01:25:54 PM

Here is my setup ISP hosts abc.com and ISP SMTP server hosts mail accounts 1 - 20 are XXXX@abc.com, I want to use sme server to create 21-100 xxxx@abc.com and have both smtp servers in use with separate mailboxes.

I got the ISP to add
abc.com. IN MX 20 host.abc.com.
host.abc.com. IN A 10.10.10.2

to their DNS

this is what they originally had
abc.com. MX preference = 10, mail exchanger = smtp10.bellnexxia.net

smtp10.bellnexxia.net internet address = 206.47.199.31

Title: 2 mail servers
Post by: Damian on December 04, 2004, 10:24:30 AM

Hi Jroul,

I can't see that what you want to do is possible. Here's why...

DNS will supply the MX record for the domain that customers will send email to. That MX record doesn't know (or care) about usernames. It will only reply that server abc is responsible for handling all mail for the domain you requested.

It's a case of EITHER the ISP mailserver OR your SME mailserver. There's no way at the DNS level to distinguish between them.

If you're going to run SME server why not migrate accounts 1-20 to it ?

Damian

Title: 2 mail servers
Post by: jroul on December 06, 2004, 01:18:32 PM

Ok so how do large corporations do it, I am sure they don't use 1 server, especially if they are located in different continents.  But they do have one domain.


John

Title: 2 mail servers
Post by: Damian on December 06, 2004, 01:33:36 PM

Hi John,

The large corporations I've sysadmin'd at (Motorola & Lucent Technologies) both had honking-great mail servers responsible for subdomains.

Other admins mileage may vary ...

Damian

Title: 2 mail servers
Post by: the_mad_prof on December 06, 2004, 02:21:57 PM

Yep,

Ours is a dual P3 1.3 with 2GB ram and a U320 raid 10 array.

J.