Should one prevent reconnection before expunge?

[Aki Tuomi]

> On 21/08/2022 13:08 EEST Christian Kivalo <ml+dovecot at valo.at> wrote:
> 
>  
> On August 21, 2022 12:34:46 AM GMT+02:00, Jack Cecil <postman at sysphere.org> wrote:
> >On Fri, 12 Aug 2022, Jack Cecil wrote:
> >
> >> could you help me understand the 'doveadm expunge' feature better?
> >> 
> >> If a Maildir has 20 thousand messages and user is reading it over IMAP I have a suspicion it is not a good idea to be rewriting the dovecot index and cache at the same time.
> >> 
> >> Should I temporarily prevent login (e.g. with passwd-file deny) and then kick them before the expunge?
> >
> >Hi. Could someone please drop me a hint? I have 309 users that will be very angry with me if their Thunderbirds start displaying 0 messages :(
> >
> >Thanks.
> I had never thought about this, i do have some folders for which i expunge message with doveadm with a cron job, never had a problem.
> 
> What keeps you from testing with a test account to see what happens when you expunge while logged in? My assumption is, the client will update it's knowledge of the mailbox on next access or login. 
> -- 
> Christian Kivalo

Running doveadm expunge while user is logged in, is safe. 

Aki