Using Classic Outlook on Windows for personal email, calendar, and contact management
My issue is similar to ElBurgo:
Body of text is replaced by 2 or 3 Chinese characters.
It's always a Reply; not a new email.
Unlike ElBurgo:
No signature has been present when the problem occurs.
All but one time, the messages being replied to contained http links.
It's awful because the original body of the sent message is lost (there is no record of it). The sent mail folder shows the email with the Chinese characters in the body.