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how to send messages alternately to two MTA's?

I would like to set up a constallation of a HA-iMS 5.1 and two Virusscanners working parallel but not clustered.How can I address those two MTA's (Virusscanners) alternatly or even randomly.Thanks in advance,Roberto
[251 byte] By [RobertoProietti-Bernardini] at [2007-11-25 7:10:52]
«« How can I route a mail to a mailhub depending on the IP the mail is coming from?
»» I am seeing errors like:Status: 5.4.4 (Illegal host/domain name found). Almost all destinations
# 1

In addition to what Chris said, you could also do the following

setup an MX record of say

virusscanner IN MX 10 hostA

virusscanner IN MX 10 hostB

Then create a special channel on the iMS machine to route mail to this MX record using the channel keyword 'daemon' and the value of virusscanner.

I do this sort of setup all the time, you could also use the keyword randommx to make iMS randomize which one it will use.

708686 at 2007-6-29 17:43:29 > top of Java-index,E-Mail, Calendar, & Collaboration,Sun Java System Messaging Server...
# 2

there are 2 ways you could do this.

First is to use the BIND DNS round robin scheme which will bounce clients doing DNS lookups between the two or more IP addresses associated with each system.

The better and more reliable way to do this however would be to use a network load balancer. Some of the better ones will even track weather the service is up on a host and if it detects an outage it will not route clients to the down system.

-Chris

709463 at 2007-6-29 17:43:29 > top of Java-index,E-Mail, Calendar, & Collaboration,Sun Java System Messaging Server...
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