If I want download all the attachments file in the mail (right click - Save all) It creare a zip file, but in the mac can not open the created zip file…
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Hi, this has never been reported, looks like the created zip file is not good for OSX.
We will check, thanks.
Gabriele
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Hi @favalcatraz, thank for the tip 
Bug open: https://issues.sonicle.com/browse/WT-811
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@favalcatraz did you try to open that files with The Unarchiver?
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Hi @pike,
I have used a “Utility compressione” app and doesn’t work…
Now I use a “The Unarchiver” app (that I didn’t know) and it works…
Thank you for your suggestion 
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Sometimes the OS do not deliver full tools needed. In every Windows installation I do 7-Zip is a default.
Unfortunately it’s not compiled for MacOS. Unarchiver should be free.
That won’t ease @lucag for some digging and improving
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