2007/1/10, Thomas Zajic <zlatko@zlatko.fdns.net>:
* John Peacock, 2007-01-09 19:35

> [...]
> When trying to move large numbers of messages to Trash using Thunderbird
> 1.5.0.9, I would get "Lost connection with server" messages at anything
> over about 1500 messages. The strange thing is that when I checked the
> trash folder, the deleted messages were there multiple times, i.e.
> everytime I attempted to move all messages to Trash, plus everytime it
> failed until I got below the magic number.
> [...]

I think this is a Thunderbird problem rather than a Dovecot one. I had
the same thing happening recently when I moved last year's logfiles to
my archive folder (36000+ messages).

I had this on 1.0rc10, and moved to 1.0rc15 and it went away (or pushed the limits
over the number of messages I wanted to delete) and I was also using Thunderbird 1.5.0.x.
I'll report if it happens to me again.