Scalix 10 - Thunderbird - AutoSave - Slows Down Thunderbird

[neronsp]

We have this program with one of our customer's site. They use the AutoSave feature on Thunderbird. I noticed that the AutoSave is using the draft folder and our customer's thunderbird client is using IMAP to sync its email.

I have checked the following:

name resolution
disk io's
zombie processes

and I found nothing out of the extra ordinary.