mdbox + alt storage + purge = wtf ...

[Matt Bryant]

All,

Is there a bug in doveadm purge ? Configured alt storage and move
messages in inbox to the alternate path all well and good. However,
after deleting some messages and running a purge on the mailbox found
that all messages got recopied over to primary location. I guess this
maybe because its re-writing the file and ditching the purged mail ..
but shouldnt it keep a track that they were located on alt storage path ??

rgds

Matt