New Error Message

Recently, I just transferred some old messages from my old HD to my new computer & I started getting an error message I haven’t seen before:

“(IMAP) BAD (CLIENTBUG)Invalid message date from client”

Even when I click “Ignore all” the error message keeps returning. Suggestions, please!

Bill

Found 14 transferred messages that had incomplete dates. Deleted these 14 & problem disappeared!