Package: gnus

Hi,

When trying to enter a nnimap group with many unread messages, Gnus
hangs with, in the echo area, the message: "nnimap read 0k from [server]".

In fact, a very long IMAP request is generated from function
'nnimap-retrieve-headers' (see the attached logs for an example), and
the server replies with "* BAD maximum line length exceeded".
In this case, the server (Zimbra) rejects lines longer than 10240 octets.