Buongiorno, la nostra posta inviata dopo 10 giorni automaticamente va nel Cestino…come possiamo fare perchè rimanga in posta inviata?
If you have enabled Automatic Archiving, disable it (Menu > Tools > Settings > Mail > Automatic Archiving) and see if there is any difference, but it should move the messages to a separate Archive folder tree and not the Trash anyway.
Otherwise eM Client is not able to move messages based on age. Check with any other devices connected to the same account, or with your email provider. Either of them could be doing this.