[Dovecot] Running a dovecot cluster with mixed versions?

[Ian Foutch]

I have been trying to find information and possible issues with running a cluster of dovecot server with different versions without any luck. 

We have an existing cluster with dovecot v1.1.10 and tried migrating to a new cluster with dovecot v2.0.12.  We ran into some issues when we moved traffic to the new cluster and have been unable to reproduce it in our own testing. We may need to put real usage on the new servers but would like to be able to do this by adding newer servers into the existing cluster. 

What are the potential issues with doing this?

Thanks,
--Ian



 
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