Delete vs. Expunge in Public Namespace

[Timo Sirainen]

On 3 Oct 2018, at 9.03, Chris <chris2014 at postbox.xyz> wrote:
> 
> On Tue, 2 Oct 2018 18:04:21 +0200
> Chris wrote:
> 
>> Is this because the mailbox is
>> part of public namespace?
> 
> Or are they expunged because they're duplicates? Is there any check?
> Based on Message ID?

No.. None of this makes sense. Dovecot doesn't auto-expunge \Deleted mails in any situation.

I see your tool says:

    parser.add_option("",   "--no-close",  dest='no_close', action="store_true",
                        help='Do not "close" mailbox when done. Some servers will purge deleted messages on a close command.')

If it's sending CLOSE, that explains it. It's not just "some servers", it's all IMAP servers. There's UNSELECT command to close without expunging.