courier imap - unable to access shared folders: "operation not supported"

[R Skinner]

On 07/09/13 21:56, Mark Felder wrote:
> The courier documentation says this about using "enhanced idle" over NFS
>
>> FAM (but not Gamin) also works with NFS filesystems. On NFS 
>> clientsfam transparently forwards file monitoring requests to a peer 
>> famprocess on the NFS server.
>
> Do you have a peer fam process on the NFS server?
No, I don't. But then it was something I thought might help the 
situation and another feature to start playing with. Bit of a stretch 
really... but I was getting desperate.

Would that have anything to do with the main problem though?