This seems, IMHO, more a client-side feature missing than a server-side one. Could be, but this feature/plugin (i'm fine with using a
Leonardo Rodrigues wrote: plugin for this) on the server causes all clients to behave the same way (there are client's lacking this feature and most clients that do support this feature don't have an option to turn it off...), which is worth something :), and a plugin IS optional anyway ;).
is there any other IMAP server with similar 'feature' ??? I have never seen any .... but i confess i have seen pretty few different imap server running ....
do any other IMAP software daemon (like courier, for example) or any other full email package (like Zimbra or even Exchange, for example) have this feature in server-side fashion ??? My previous IMAP server: courier, has this feature, I can't recall the default setting, but it can be turned on and off in the configuration file. And I think the Exchange IMAP connector has this by default as Outlook is their default client, which lacks this feature.