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Jagdish
60 pts.
 About Mail Server
Corporate portal applications, DataCenter, Exchange, Network management software, Networking
I have a design question. I have my domain and the mail servers geographically placed apart. There are two Mail Servers, each connected to two different ISPs. I also have two Mx Records each pointing to the two mail servers. If the link to Mail server1 is cut for any reason, mails should percolate through Mail server2 and it should just forward them to Mail server1. Both the mail server are linux based and on the same LAN. Is this possible ? If yes, how do we accomplish this? Thanks in advance

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ASKED: June 7, 2005  11:55 PM
UPDATED: June 8, 2005  11:44 PM
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If you have 2 ISP with 2 different domains then you need to set up 2 MX records for each domain, the second one with a higher Proiority then the fist main default mail server, the second MX record should point to the IP address of the other domain so if the first mail server is down and unreachable it is sent to the second mail server on the other domain on the other IP address. hope this helps
Last Wiki Answer Submitted:  June 8, 2005  3:14 am  by  Soulby   0 pts.
All Answer Wiki Contributors:  Soulby   0 pts.
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This is fine. But I have only one domain and two ISPs

Jagdish
 60 pts.
 

Have not tried your specific scenerio. You can setup different ip addresses pointing to the same DNS name and use a preference. I used it on external DNS as an alternate path over the WAN.

Dkdoyle
 0 pts.
 

You do the same thing soulby said. You create a second MX record with a higher preference pointing to your other mail server.

Wickedstick
 0 pts.
 

The purpose of a secondary MX is if you have a second mail server configured to receive email to your domain. So if you are yahoo.com and have only one phisical email server, then you only need to use one mx, but if you have 2 email servers one that is there for redundancy and maybe failover. Both email servers accept email for yahoo.com, the second is there in case the first has any kind of trouble making it unable to accespt email then the secondary MX points to the server that is running as back up. Same domain, different domain, does not matter.

Boardinhank
 60 pts.
 

Thanks for all the hints and suggestions. We will make the setup amdn then get back to let you know if it was successful
Thanks again.

Jagdish
 60 pts.