class Net::IMAP::ResponseParseError::InvalidResponseError

Error raised when the server sends an invalid response.

This is different from UnknownResponseError: the response has been rejected. Although it may be parsable, the server is forbidden from sending it in the current context.

This could be caused by a bug in the server or in Net::IMAP. Or it might indicate a malicious server, a man-in-the-middle attack, or client-side command injection. So the client should automatically disconnect, abruptly (without logout).

Note that InvalidResponseError does not inherit from ResponseError: it can be raised before the response is fully parsed. A related ResponseParseError or ResponseError may be the cause.