Stresstesting IMAP clients (Hackvalue)

you don't want to expunge immediatly after delete

for one thing expunge is frequently a fairly expensive (i.e. slow) command on the server

for another, it's not uncommon for IMAP users to have multiple clients open to the same mail server, auto-expunge can cause surprises for the user (especially if the delete is done as part of a filter of some sort with the user actually looking at another client)