[Mageia-dev] Duplicate reception of email messages

[Juergen Harms]

For some time now, Thunderbird receives messages twice (Mageia 3 Alpha2, 
thunderbird 16.0.1-1, using imap): my folder display contains twice an 
apparently identical message.

The problem had first looked random - some messages single, some 
messages duplicated. Looking closer, it appears as if this problem only 
- and always - happens if messages arrive while thunderbird is already 
running. If messages arrive while I have no active thunderbird, and when 
I then launch thunderbird, these messages are correctly listed as a 
single message.

It looks as if this problem is between my thunderbird agent and my 
service provider: if I use the web-access (convergence) to access the 
mail kept on the server, I see the same kind of duplication / 
non-duplication.

Does somebody see an explanation? is this problem known?