Disable SIS

[Tanstaafl]

On Wed Mar 14 2018 15:17:58 GMT-0400 (Eastern Standard Time), Nick
Rosier <nick+dovecot at bunbun.be> wrote:
> I'm currently running a small home-server with Dovecot. A long time ago 
> I configured it with SIS enabled. I would like to stop using SIS.
> 
> If I remove sis from mail_attachment_fs will the old mails that are 
> stored in SIS-storage still be accessible?
> How can I convert all mailboxes to stop using SIS and store attachments 
> back in the mails?

As one who used Dovecot years ago without SIS (it still wasn't well
baked) but was very interested in it, I'm curious why you want to stop
using it?