[MlMt] NO AUTHENTICATE failed

[Pascal Felber]

Hi,

Since our IT department migrated my mailbox to a new exchange server, I cannot connect with Mailmate anymore (but I can with some other clients).
Interestingly, it does not reject the password immediately but instead seems to time out. The log reads:

15:57:36 Trying to connect to <server address> on port 993
15:57:36 Successful connection on socket 30.
15:57:36 Initiating secure connection...
15:57:36 Setup of secure connection complete (TLSv1).
15:57:36  Cipher: DHE-RSA-AES256-SHA      SSLv3 Kx=DH       Au=RSA  Enc=AES(256)  Mac=SHA1
15:57:36 S: * OK IMAP service is strictly reserved for <company> users
15:57:36 C: A0 CAPABILITY
15:57:36 S: * CAPABILITY IMAP4 IMAP4rev1 AUTH=PLAIN AUTH=NTLM AUTH=GSSAPI STARTTLS UIDPLUS ID CHILDREN IDLE NAMESPACE LITERAL+
15:57:36 S: A0 OK CAPABILITY completed.
15:57:36 Retrieving password (keychain or user request)
15:57:36 C: A1 AUTHENTICATE PLAIN
15:57:36 S: +
15:57:36 C: ••••••••••
15:57:58 Waited 22 seconds on read.
15:57:58 S: A1 NO AUTHENTICATE failed.
15:57:58 Error: Server response: “A1 NO AUTHENTICATE failed.”. Command attempted: “••••••••••”.

Obviously I double-checked the username and password, and I tried from 2 different machines.

Any idea of what could be the problem, and what to do to try and track it down?

Thanks,

Pascal