Postfix equivalent (a question from an exim admin)?

[Marc Silver]

Hi guys,

I have two (probably) very simple questions for you Postfix gurus.
Firstly, I was wondering if there's a Postfix equivalent of the 'exim -bt  
<address>' command in Exim?  This command shows the specific route that  
the MTA would use to deliver the message for the given recipient.  An  
example of the output can be seen below:

[EMAIL PROTECTED] exim]# exim -bt [EMAIL PROTECTED]
[EMAIL PROTECTED]
  router = dnslookup, transport = remote_smtp
  host smtp3.google.com [64.233.183.25] MX=10
  host smtp4.google.com [72.14.221.25]  MX=10
  host smtp2.google.com [64.233.167.25] MX=10
  host smtp1.google.com [209.85.237.25] MX=10

[EMAIL PROTECTED] exim]# exim -bt [EMAIL PROTECTED]
[EMAIL PROTECTED]
  router = forcepath, transport = remote_smtp
  host 172.24.125.11 [172.24.125.11]

Secondly, is there a way to specify multiple hosts in a transport_map?   
Ie, can I have mail send to one host and/or balance/failover to another if  
the primary host is unavailable?

I appreciate any help.

Thanks,
Marc