SENT MAIL DISAPPEARED AFTER UPGRADE TO NEW VERSION

After upgrade to new version of em client, can’t open old sent messages. They appears correctly  only if I try to forward the mail. And if i sent the new mail the original was erased

Hello Stefano,
what mail account does this happen with?
Is it set up with POP/IMAP/Exchange mail protocol? Can you check the Mail>Tools>Accounts window?

Regards,
Olivia

We have 2 accounts. First uses pop protocol, the second imap protocol. All was ok before upgrade. 

In setting we have signature e templates active.

In both cases the problem is the same.