I just installed eM Client today and I have duplicate mails for each mail that comes in. I have Gmail for my webmail. I tried deleting my account and re-installing and I still have the same issue. Any help is aapreciated.
Where are you seeing the duplicates?
If it is in any of the Favorite folders like All Inboxes or Unread, then you may have the same account setup more than once.
I have subfolders under my Inbox and every one of the messages in those folders have duplicates and some have triplicates.