Really slow IMAP performance

[Neil Jerram]

Aki Tuomi <aki.tuomi at dovecot.fi> writes:

> Yes. You deffo are looking at several reasons for slowness.
>
> I can only recommend moving into maildir or sdbox format, and probably new HDD too.
>
> https://wiki2.dovecot.org/Tools/Doveadm/Sync here is example of 'converting' between mailbox formats using dsync. You should also read https://wiki2.dovecot.org/Migration/MailFormat
>
> mbox format has been known to act up with dsync occasionally, so I recommend using 
>
> doveadm backup maildir:~/Maildir

Thanks, I've done that now, and things are looking much better.

I rediscovered that I've configured postfix to deliver locally using
dovecot-lmtp - which meant that I then only needed to change dovecot's
mail_location setting, and nothing at all in the postfix config.

Many thanks! - Neil