POP
No Low-bandwidth mode
Besides it downloads brand new messages but some old stil "see" as not downloaded.

I use Opera (with mail client) since 2008 (about 25 GB and 10.000 mails). And after checking new messages it shows that "fetching messages ../20" and after that shows communicate "no new messages received". For me it's a problem because process last about 10 minutes and i presume opera downloads it phisically but not shows. How to fix it?
However after receiving a new message opera shows it but afterwards shows downloading lost 20 messages.