[imp] Help with enabling spam reporting

[HiP-HiPpO]

>>>>>> I created the file imp/conf/backends.local.php with only the  
>>>>>> following contents. When logging in, I see no additional option  
>>>>>> to report mail as spam. How do I enable reporting?
>>>>>>
>>>>>> <?php
>>>>>> $conf['spam']['reporting'] = true;
>>>>>> $conf['spam']['spamfolder'] = Spam;
>>>>>> $conf['notspam']['reporting'] = true;
>>>>>> $conf['notspam']['spamfolder'] = Inbox;
>>>>>> $conf['spam']['program'] = '/usr/bin/spamc -C report -u %l';
>>>>>> $conf['notspam']['program'] = '/usr/bin/spamc -C revoke -u %l';
>>>>>>
>>>>>> Horde version 5.2.12
>>>>>> Imp version 6.2.16
>>>>>>
>>>>>> Thank you, Art
>>>>>> -
>>>>>
>>>>> I replaced all the contents in backends.local.php with the  
>>>>> example shown in this thread and I have spam reporting buttons
>>>>> https://lists.horde.org/archives/horde/Week-of-Mon-20150216/053728.html
>>>>
>>>> This does not seem to be working.
>>>
>>> This will only work if you have a spamd daemon running and it can  
>>> accept connections from the spamc client.
>>>
>>>>  Initially, I was able to select a few incoming messages and  
>>>> choose the Spam button to report.  This is no longer working.  
>>>>  Now I select only one message, choose "Report as Spam".  The  
>>>> message is updated with an icon to suggest it is being processed  
>>>> as spam, however, that process never completes and the logged in  
>>>> session is hung in the browser.  I need to kill the browser and  
>>>> relogin to find that one message in an unchanged state, still  
>>>> seen as New in the Inbox.  
>>>
>>> --
>>>  
>>
>> spamc seems to be working.  I used the GTUBE example file  
>> here; http://spamassassin.apache.org/gtube/gtube.txt
>> and saved it as test.eml.  On a command line, I used `spamc -R <  
>> test.eml`.  This produced output and the test email was given a  
>> content analysis score of 1000.0 points.
>>
>> I hadn't noticed the difference in versions between Groupware and  
>> Horde itself before.  Seems odd, but maybe not.
>> Horde Groupware Webmail Edition 5.2.16
>> Horde 5.2.12
>> Imp 6.2.16
>
> Seems very unreliable at this point.  With one login session, I was  
> able to select one email in Inbox and choose the Spam button.  I  
> selected the next mail, choose the Spam button and the browser  
> churns for a very long time.  I have to kill the browser instance  
> and log back in.  After logging in again, I selected a different  
> mail, clicked the Spam button and the browser churned away, I forced  
> killed the browser.  The next time logging in, I was able to mark 5  
> messages as Spam, on the 6th, browser churns and another force kill  
> of the browser instance.  
>  

Is there anything I can provide (proxy logs, debug logs, etc.) to help  
troubleshoot this or should I consider it a broken feature and back  
out of the configuration change?