Office 365 "BAD Command received in Invalid state."

[Richard Lewis <richardlewis@fastmail.co.uk>]

Hi there,

My employer recently sold out their email provision to Microsoft using
that company's Office 365 'cloud' offering. This service provides an
IMAP implementation with which I'm having some problems.

I regularly find that I can't establish a connection when I first try;
it takes up to 10s of attempts over several minutes before Wanderlust
successfully manages to retrieve new message headers. For as long as
the connection is left open it works fine. Each of the failed attempts
results in this error message:

"BAD Command received in Invalid state."

I have IMAP debugging enabled and have pasted the full log below.

The Web seems to suggest that this could be a password encryption
setting problem on the server side. (My employer has not been very
helpful in attempting to debug this; they (understandly) argue that
they don't support Wanderlust.) However, it seems from the
'capability' response that only PLAIN is supported, so I can't really
experiment further in that direction. I've also tried switching been
SSL on port 993 and STARTTLS on port 143; doesn't make any difference.

Any suggestions what might be going on here?

Richard
-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Richard Lewis
j: ironchicken@jabber.earth.li
@: lewisrichard
http://www.richardlewis.me.uk/
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

[10:11:48] <- elmo-imap41 capability
[10:11:48] -> * CAPABILITY IMAP4 IMAP4rev1 LOGINDISABLED STARTTLS UIDPLUS CHILDREN IDLE NAMESPACE LITERAL+
[10:11:48] -> elmo-imap41 OK CAPABILITY completed.
*elmo-imap41* OK arrived
[10:11:48] => ((ok nil) (capability (imap4 imap4rev1 logindisabled starttls uidplus children idle namespace literal+)))
[10:11:48] <- elmo-imap42 starttls
[10:11:48] -> elmo-imap42 OK Begin TLS negotiation now.
*elmo-imap42* OK arrived
[10:11:48] => ((ok nil))
[10:11:48] <- elmo-imap43 capability
[10:11:48] -> * CAPABILITY IMAP4 IMAP4rev1 AUTH=PLAIN UIDPLUS CHILDREN IDLE NAMESPACE LITERAL+
[10:11:48] -> elmo-imap43 OK CAPABILITY completed.
*elmo-imap43* OK arrived
[10:11:48] => ((ok nil) (capability (imap4 imap4rev1 auth=plain uidplus children idle namespace literal+)))
NO LOGGING
NO LOGGING
NO LOGGING
NO LOGGING
[10:11:50] <- elmo-imap45 capability
[10:11:50] -> * CAPABILITY IMAP4 IMAP4rev1 AUTH=PLAIN UIDPLUS CHILDREN IDLE NAMESPACE LITERAL+
[10:11:50] -> elmo-imap45 OK CAPABILITY completed.
*elmo-imap45* OK arrived
[10:11:50] => ((ok nil) (capability (imap4 imap4rev1 auth=plain uidplus children idle namespace literal+)))
[10:11:50] <- elmo-imap46 namespace
[10:11:50] -> elmo-imap46 BAD Command received in Invalid state.
*elmo-imap46* BAD arrived
[10:11:50] => ((bad (nil "Command received in Invalid state.")))