On Wed, Oct 13 2010, Ludovic Courtès wrote:

> ‘sieve-manage’ fails for me:
>
> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>   string-match("DIGEST-MD5" nil)
>   sieve-manage-capability("SASL" "DIGEST-MD5" " *sieve* imap.example.com:2000")
>   sieve-manage-digest-md5-p(" *sieve* imap.example.com:2000")
>   sieve-manage-open("imap.example.com")
>   sieve-open-server("imap.example.com" nil)
>   sieve-manage("imap.example.com")
>   call-interactively(sieve-manage t nil)
>   execute-extended-command(nil)
>   call-interactively(execute-extended-command nil nil)

I've fixed that bug recently. But maybe you use an older version.

> Connecting to that server on port 2000 shows this:
>
> Connected to imap.example.com.
> Escape character is '^]'.
> "IMPLEMENTATION" "dovecot"
> "SASL" ""

This is not valid. The server is saying there's no way to SASL method to
authenticate with.

> Any idea what could go wrong or how I should proceed to debug further?
> It seems to be trying to use SASL, which isn’t supported by this server.

Just put:
disable_plaintext_auth = no
in dovecot.conf. It will then tells you:
"SASL" "PLAIN"

And things will work.

You can also put other authentification mechanisms such as CRAM-MD5,
etc, in auth default { mechanisms = … } in dovecot.conf. I did not had
the time to play with that yet however, but it should also work with
sieve-manage.

-- 
Julien Danjou
// ᐰ <julien@danjou.info>   http://julien.danjou.info