On Thu, May 31, 2012, at 12:05 AM, Adrien W. de Croy wrote:  
> problem is that to convert back to msgno for an expunge response 
> requires a lock on the source.

Depends if you cache them or not.  Since msgno is per-connection, it
doesn't matter if they've changed in other sessions meanwhile.
 
> COMPRESS can take the pain out of the actual protocol transmission.
>   
> Maybe require VANISHED responses instead.

If you want VANISHED responses you can ENABLE QRESYNC.  I see no reason
not to spit regular EXPUNGED responses otherwise.  The clients that know
how to handle VANISHED can just turn on QRESYNC, the others won't have to
deal with it.

Bron.
-- 
  Bron Gondwana
  [email protected]

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