[Dovecot] Duplicate message

[Timothy Murphy]

I'm running dovecot on my desktop
and using kmail as a client on my laptop.

I am very happy with this -
I was previously running kmail under NFS,
and this is infinitely better.

There is one small issue, which is not very important.
I get a small number of messages apparently duplicated.
This doesn't really matter, as there is a facility
Folder=>Remove Duplicate Messages under kmail,
and this deals with the issue easily enough.

I just wondered though why I get the duplicate messages,
and if there is some simple way to avoid them?