Alternate outbound delivery path

Question

looking for a method to have a C150 relay mail through another C150 if it is unable to deliver outbound messages to the internet (ie. looses internet connectivity in one of our data centers).
Each device is in a seperate data center with seperate Internet providers and we have private links that they can communicate over internal interfaces.
Was thinking I could do it with SMTP routes, but I haven't been able to come up with anything that works yet.
Thanks for your ideas.

Answer 1

You can do it at the point that one of them fails - we do this all the time where I work.
On both boxes, setup a sender group with a relay policy to accept mail from the other system.
On the box that no longer has internet connectivity:
1) export current smtproutes (if you have any - so you can return it to the orginal list easily)
2) clear the list
3) create the ALL smtproutes as your other gateway
4) delivernow (then pick all)
Now - if you don't like getting called in the middle of the night:
While your normal routes are there:
smtproutes export smtproutes.txt
smtproutes clear
smtproutes new ALL
smtproutes export disaster_smtproutes.txt
smtproutes import smtproutes.txt
Train your 24x7 personnel to login to the box when there is an issue and type:
smtproutes import disaster_smtproutes.txt
commit
delivernow all
logout
And when the problem goes away:
smtproutes import smtproutes.txt
commit
delivernow all
logout