Deduplication ?

Hello ! (i’m french, sorry for my english) I use eM Client for my Outlook Email adress. Because of wrong manipulations, I have several times the same Emails in my Sent box. I tried to use the “deduplicator” tool several times, but they always come back (because they are not canceled from my online box). Do you have ideas for what I’m doing wrong ?Thanks,

ok, I found a solution myself, running the deduplicator tool offline. Thanks.

Also, you may have to go to menu/tools/settings/mail/send and uncheck “Save copy of messages in “Sent” folder”, otherwise future sent items will duplicate.