kmail (kde email client) error, can't retrieve mail through imap

kmail (kde email client) error, can't retrieve mail through imap

Hi,

I'm using kmail as my mail client and since a few days, I can't get mail from imap.
I get this error message :
"Login failed, server replied: A000002  NO Your account is temporary blocked for IMAP use... blah blah"
There was no update to the mail client, so I don't undertand why I can't fetch my mails anymore...

Any clues ?

(sorry for poor english)