[BUG] Prefer AUTH=CRAM-MD5 makes login fail in some IMAP servers.

[egallego@babel.ls.fi.upm.es (Emilio Jesús Gallego Arias)]

Hi all,

starting with:

,----
| commit 1809f181366e42a47ba94551b54fd0d56d7e8dee
| Author: Lars Magne Ingebrigtsen <larsi@quimbies.gnus.org>
| Date:   Sun Jan 2 23:28:40 2011 +0100
|
|     (nnimap-login): Prefer AUTH=CRAM-MD5, if it's available.
|
|     This avoids sending passwords in plain text over non-encrypted
|     channels.
`----

I cannot login to one of my IMAP servers anymore.

I have several IMAP servers enabled, but as much as I try to isolate
that faulty server the other connect. I've tried to edit newsrd.eld,
etc... but to no avail, one server always gets reconnected.

So I'm not able to meaningful debug it, but here is some info from IMAP
debug buffers:

29 BAD unrecognized IMAP4 command or invalid state
30 BAD unrecognized IMAP4 command or invalid state
31 BAD unrecognized IMAP4 command or invalid state
32 BAD unrecognized IMAP4 command or invalid state
33 BAD unrecognized IMAP4 command or invalid state
34 BAD unrecognized IMAP4 command or invalid state
35 BAD unrecognized IMAP4 command or invalid state
36 BAD unrecognized IMAP4 command or invalid state
37 BAD unrecognized IMAP4 command or invalid state
38 BAD unrecognized IMAP4 command or invalid state
39 BAD unrecognized IMAP4 command or invalid state
40 BAD unrecognized IMAP4 command or invalid state
41 BAD unrecognized IMAP4 command or invalid state
42 BAD unrecognized IMAP4 command or invalid state
43 BAD unrecognized IMAP4 command or invalid state
44 BAD unrecognized IMAP4 command or invalid state
45 BAD unrecognized IMAP4 command or invalid state
46 BAD unrecognized IMAP4 command or invalid state
47 BAD unrecognized IMAP4 command or invalid state
48 BAD unrecognized IMAP4 command or invalid state
* BYE user input timeout

Process *nnimap*<2> connection broken by remote peer

19:08:12 (nnimap "server" (nnimap-address "server.com") (nnimap-stream network))

19:08:15 7 AUTHENTICATE CRAM-MD5
19:08:22 29 EXAMINE "Spam"

Regards,
Emilio