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Unfortunately, this addon does not work for me (IMAC, Thunderbird 78.6.0), but I admit that this is a very necessary item. It would be great if the author could fix it and make it easy and convenient to use. I am ready to make a monetary contribution.

Questa recensione riguarda una versione precedente (4.2.2) del componente aggiuntivo. 

Dear Bob,
Can you please write an e-mail to k-l-p@gmx.de and describe as detailed as possible what you did and what exactly didn't work?
Best Regards
C-E