Petar Bogdanovic wrote:
Is somebody maybe experiencing something similar?
Yes, I have experienced it while moving between two IMAP mailboxes, using Thunderbird 1.01. The target mailbox was IMAPS on a small (not to say tiny) server 1.0beta3, my workstation has 768 MB RAM.
I could nail it down to a few specific mails that TB couldn't move without hanging. They weren't especially large, 20-30 kbyte, but they all had HTML attachement IIRC.
Perhaps it's a TB problem, not a dovecot problem? When I was using the Windows platform, I used a program called Becky!. http://www.rimarts.co.jp/becky.htm I couldn't try the same move operation with Becky!, but I have gained a large (huge) amount of confidence for that program. Try it (30 days evaluation, then you have a nag screen). There's a mailing list for Becky!, I can dig up the address for you, just mail me off-list.
/Peter
Peter Lindgren, dataingenjör E-post: peter "at" norrskenkonsult punkt com http://www.norrskenkonsult.com