We are having an issue with our namespace configuration, as per the eM Client folks. We present the following namespaces via IMAP, with Dovecot as backend. This is the actual imap conversation

08:37:10.896|03E|   01: A4 ID ("name" "eM Client" "version" "10.1.4393.0" "GUID" "EMCLIENT_V1" "vendor" "eM Client" "contact" "support@emclient.com") 08:37:10.961|03E|   01: * ID ("name" "Dovecot") 08:37:10.961|03E|   01: A4 OK ID completed (0.001 + 0.000 secs). 08:37:10.961|03E|   01: A5 NAMESPACE 08:37:11.184|03E|   01: * NAMESPACE (("" ".")("Labels." ".")) (("shared." ".")) NIL 08:37:11.184|03E|   01: A5 OK Namespace completed (0.001 + 0.162 + 0.161 secs).

As per them, the problem is the first empty prefix: "The problem is not necessarily in the fact that it is empty but because it is then mixed with another one with a prefix. Logically it means that everything in the empty namespace must be mixed together with the prefixed namespace and that is not really ok."

"NAMESPACE (("personal." ".")("Labels." ".")) (("shared." ".")) NIL would make sense as both personal namespaces point to different directory structures."

Reading the RFC I'm not understanding this at all, but then again, maybe I'm wrong.

Anyone care to shed some light on how multiple namespaces should be defined ?

Thank you, Scott