I've run a session with the camel debug output and tried to pull out the relevent parts:


It does authenticate ok using cram-md5 over an SSL connection:
-------------------------------

  full_name:received: * OK [CAPABILITY IMAP4REV1 LOGIN-REFERRALS AUTH=CRAM-MD5 AUTH=PLAIN AUTH=LOGIN] imap.example.com IMAP4rev1 2003.339 at Thu, 14 Aug 2008 15:53:19 +0100 (BST)
sending : B00000 CAPABILITY
received: * CAPABILITY IMAP4REV1 IDLE NAMESPACE MAILBOX-REFERRALS BINARY UNSELECT SCAN SORT THREAD=REFERENCES THREAD=ORDEREDSUBJECT MULTIAPPEND LOGIN-REFERRALS AUTH=CRAM-MD5 AUTH=PLAIN AUTH=LOGIN
received: B00000 OK CAPABILITY completed
e-data-server-ui-Message: Unable to find password(s) in keyring (Keyring reports: No matching results)
e-data-server-ui-Message: Key file does not have key 'imap:__myusername;<email address hidden>com_'
sending : B00001 AUTHENTICATE CRAM-MD5
received: + PDI[...the cram-md5 authenication...]Pg==
received: B00001 OK [CAPABILITY IMAP4REV1 IDLE NAMESPACE MAILBOX-REFERRALS BINARY UNSELECT SCAN SORT THREAD=REFERENCES THREAD=ORDEREDSUBJECT MULTIAPPEND] User myusername authenticated


It gets the listing of the folders and subscribed folders OK:
-----------------------------------------------------------

received: B00002 OK NAMESPACE completed
sending : B00003 LIST "" "*"
[etc]
received: * LIST

received: B00003 OK LIST completed
sending : B00004 LSUB "" "*"
received: * LSUB (\NoInferiors) NIL INBOX
[etc]
received: B00004 OK LSUB completed


Then for some reason decides it didn't like the OK response?
------------------------------------------------------------
CamelException.setv((nil), 303, 'Unexpected OK response from IMAP server: B00001 OK [CAPABILITY IMAP4REV1 IDLE NAMESPACE MAILBOX-REFERRALS BINARY UNSELECT SCAN SORT THREAD=REFERENCES THREAD=ORDEREDSUBJECT MULTIAPPEND] User myusername authenticated')

Now it attempts to query the sever again (not over SSL), and prompts for a password, I click cancel:
-----------------------------------------------------------------------------------------------------
received: * OK [CAPABILITY IMAP4REV1 LOGIN-REFERRALS STARTTLS LOGINDISABLED AUTH=CRAM-MD5] imap.example.com IMAP4rev1 2003.339 at Thu, 14 Aug 2008 15:53:35 +0100 (BST)
sending : C00000 CAPABILITY
received: * CAPABILITY IMAP4REV1 IDLE NAMESPACE MAILBOX-REFERRALS BINARY UNSELECT SCAN SORT THREAD=REFERENCES THREAD=ORDEREDSUBJECT MULTIAPPEND LOGIN-REFERRALS STARTTLS LOGINDISABLED AUTH=CRAM-MD5
received: C00000 OK CAPABILITY completed
e-data-server-ui-Message: Unable to find password(s) in keyring (Keyring reports: No matching results)
e-data-server-ui-Message: Key file does not have key 'imap:<email address hidden>'
sending : C00001 LOGOUT
received: * BYE imap.example.com IMAP4rev1 server terminating connection


It does it again, this time I give it the password - since LOGINDISABLED is in effect it will be rejected regardless:
---------------------------------------------------
received: * OK [CAPABILITY IMAP4REV1 LOGIN-REFERRALS STARTTLS LOGINDISABLED AUTH=CRAM-MD5] imap.example.com IMAP4rev1 2003.339 at Thu, 14 Aug 2008 15:54:01 +0100 (BST)
sending : C00000 CAPABILITY
received: * CAPABILITY IMAP4REV1 IDLE NAMESPACE MAILBOX-REFERRALS BINARY UNSELECT SCAN SORT THREAD=REFERENCES THREAD=ORDEREDSUBJECT MULTIAPPEND LOGIN-REFERRALS STARTTLS LOGINDISABLED AUTH=CRAM-MD5
received: C00000 OK CAPABILITY completed
e-data-server-ui-Message: Unable to find password(s) in keyring (Keyring reports: No matching results)
e-data-server-ui-Message: Key file does not have key 'imap:<email address hidden>'
sending : C00001 LOGIN xxx xxx
received: C00001 NO LOGIN failed