Best posts made by kalder

Hello,
I am still using the Opera 12 browser's in-built e-mail client. Since the last couple of weeks I have noticed that it duplicates any email sent from the browser. This does not occurr if I send from Ms Outlook or my smartphone, so I guess it must be something with the browser. During this time span:

• our server admins requried all users to change password (I relate this as some google search results for other IMAP clients suggested this might be due to IMAP synchronization)
• I have temporarily installed and then removed Opera Mail (the separate product)

Thanks fro any help

I have tried through Thunderbird (so I could remove duplicates, through a specific plugin, and correct the folder). Then selected and "saved as mbox" some chunks of the emails. Imported all chunks from former sent folder into sent and all the chunks from former inbox into inbox.
It takes a bit, but seems to work.