[imp] Mail server closed the connection unexpectedly

[Jan Schneider]

Zitat von Stefan Suurmeijer <stefan at raptorweb.nl>:

> Hi Jan,
>
> Thanks for replying!
> The IMAP logs don't really show anything. I'm using Cyrus IMAP. On
> default logging, I see no evidence of the connection in the logs. Cyrus
> has some debug options in the imapd.conf file that I've been
> experimenting with a little, but so far nothing
> Cyrus also has the option to explicitly log all actions for a user. So
> I've created a directory /var/lib/cyrus/log/testuser. But nothing shows
> there either (which is logical, since the connection fails on login,
> Cyrus never knows the user)
>
> I haven't yet found a way to simply raise Cyrus' log level. Still
> Googling for that
> Any thoughts?
>
> KR
> Stefan
>
>
> On 14-11-16 11:50, Jan Schneider wrote:
>>
>> Zitat von Stefan Suurmeijer <stefan at raptorweb.nl>:
>>
>>> Hi list,
>>>
>>> I'm installing a new horde instance but keep running into a problem that
>>> has me stumped.
>>> Every time I try to login through IMP, the login fails with the message:
>>>
>>> Mail server closed the connection unexpectedly
>>>
>>> The problem isn't in the mailserver: it works perfectly with IMAP
>>> clients and I've even tried connecting IMP to another IMAP server (that
>>> works perfectly with another Horde/IMP installation), the problem
>>> persists. So it has to be something in my horde installation.
>>> I've tried logging in with TLS and without encryption, both give exactly
>>> the same error message. I've tried setting the Horde log level to DEBUG,
>>> but that didn't really give me any useful information either.
>>> I've even copied the backends.local.php from the other Horde instance
>>> that is working for me. Still the same error. So it has to be somewhere
>>> in the horde installation
>>>
>>> When I look at the Horde test page, everything is green for all
>>> applications. So I'm out of ideas.
>>>
>>> Anyone have any ideas what might be causing this?
>>>
>>> Horde version is 5.2.12 with IMP H5 (6.2.16)
>>> Relevant section of backends.local.php below
>>>
>>> Thanks in advance,
>>> Stefan
>>>
>>> My backends.local.php (relevant section):
>>>
>>> $servers['imap'] = array(
>>>     // Disabled by default
>>>     'disabled' => false,
>>>     'name' => 'Cyrus IMAP Server',
>>>     'hostspec' => 'localhost',
>>>     'hordeauth' => true,
>>>     'protocol' => 'imap',
>>>     'port' => 143,
>>>     'secure' => 'tls',
>>>     'maildomain' => 'mydomain.com',
>>>     'smtp' => array(
>>>         'auth' => true,
>>>         'horde_auth' => true,
>>>         'host' => 'localhost',
>>>         'lmtp' => false,
>>>         'port' => 25,
>>>     ),
>>>     'spam' => array(
>>>     ),
>>>     'admin' => array(
>>>          'user' => 'cyrus',
>>>          'password' => 'cyruspassword',
>>>          'userhierarchy' => 'user.'
>>>     ),
>>>     'acl' => true,
>>>     'cache' => false,
>>>     'quota' => array(
>>>         'driver' => 'imap',
>>>         'params' => array(
>>>             'hide_when_unlimited' => true,
>>>             'unit' => 'MB'
>>>         )
>>>     ),
>>>     'special_mboxes' => array(
>>>          IMP_Mailbox::MBOX_DRAFTS => 'Drafts',
>>>          IMP_Mailbox::MBOX_SENT => 'Sent',
>>>          IMP_Mailbox::MBOX_SPAM => 'SPAM',
>>>          IMP_Mailbox::MBOX_TEMPLATES => 'Templates',
>>>          IMP_Mailbox::MBOX_TRASH => 'Trash',
>>>     ),
>>>     'autocreate_special' => false,
>>> );
>>>
>>>
>>> Log information:
>>>
>>> cat /tmp/imp_imap.log
>>> ------------------------------
>>>>> Sat, 12 Nov 2016 21:57:44 +0000
>>>>> Connection to: imap://localhost/
>>>>> Server connection took 0.0003 seconds.
>>>>> ERROR: Server closed the connection.
>>> ------------------------------
>>>>> Sat, 12 Nov 2016 21:57:47 +0000
>>>>> Connection to: imap://localhost/
>>>>> Server connection took 0.0003 seconds.
>>>>> ERROR: Server closed the connection.
>>
>> And what's in the IMAP server's logs at this time?
>>

Try tcpdump or wireshark.

-- 
Jan Schneider
The Horde Project
http://www.horde.org/