dovecot - Mar 2005 - logging

I'm curious about exactly what this means in my log:

Mar 13 10:56:20 cerebus dovecot: imap-login: Disconnected [130.94.242.20]
Mar 13 10:56:51 cerebus last message repeated 177 times
Mar 13 10:57:32 cerebus last message repeated 179 times

Now...does Dovecot ONLY log the names of users on successful attempts?  Is
this "Disconnected" log entry an indication someone ran a
username/password attack against the imap server and failed to
authenticate?  If so, is there any way to make this a little more verbose,
so I can perhaps see what names, etc. the annoying idiot is throwing
against my server....?

Thanks.

On Sun, 2005-03-13 at 15:48 -0600, F. Even wrote:
> I'm curious about exactly what this means in my log:
> 
> Mar 13 10:56:20 cerebus dovecot: imap-login: Disconnected [130.94.242.20]
> Mar 13 10:56:51 cerebus last message repeated 177 times
> Mar 13 10:57:32 cerebus last message repeated 179 times
> 
> Now...does Dovecot ONLY log the names of users on successful attempts?
By default, yes.
> Is this "Disconnected" log entry an indication someone ran a
> username/password attack against the imap server and failed to
> authenticate?  If so, is there any way to make this a little more verbose,
> so I can perhaps see what names, etc. the annoying idiot is throwing
> against my server....?
auth_verbose = yes

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
URL:
<http://dovecot.org/pipermail/dovecot/attachments/20050315/e57c5c14/attachment-0001.bin>