I noticed that messages from different outgoing and incoming folders are being moved to the trash. Sometimes they are just new incoming messages, and sometimes they are old - received or sent a few days or even a few weeks ago. There is no logical explanation here as they come from different senders or recipients, received or sent on different dates. Recently, I noticed that dozens of messages I sent in the last few weeks were moved to the trash.

I'm using IMAP with multiple incoming and outgoing folders. On PC I have Windows 11 Pro and I use Outlook 2021 ver. 2307 and on my iPhone I use the Zoho Mail app.