Failed transfer of mail leaves you with lot of duplicates

[davidbo]

1. Transfer mail from local mailbox L1 to IMAP-mailbox I1 so that you run out of space on the IMAP-server (i.e., you use up your quota) in the middle of the transfer

2. Note that you, when you look in L1, can't distinguish between the mails that are transferred successfully and those that never transferred.

3. Spend hours cleaning up duplicates.

I think a better behaviour would be that every mail, as soon as it is successfully transferred, is marked for deletion in the original mailbox.