Matthew Good wrote:
> On Tue, 2006-06-27 at 21:01 +0200, Jonas Borgström wrote:
>> Waldemar Kornewald wrote:
>>> Hi,
>>> unfortunately, I cannot comment on any tickets, anymore. There must be an
>>> Akismet bug. This error also happened at trac-hacks. But after I registered 
>>> and
>>> logged in it did not show up, anymore. Probably it's related to anonymous 
>>> user
>>> postings. Could you please check p.e.c and trac-hacks?
>>> Thanks!
>>>
>> I was able to comment on #2209 as an anonymous user but also found this
>> in the log on p.e.c:
>>
>> 2006-06-27 13:52:59,948 Trac[api] WARNING: Filter AkismetFilterStrategy
>> rejected content u'anonymous' submitted by "anonymous" (172.192.119.58):
>> Akismet rejected spam
>> 2006-06-27 13:52:59,949 Trac[main] WARNING: 500 Internal Error (Akismet
>> rejected spam)
>>
>> So I guess akismet is overloaded or something and sometimes respondes
>> with  a "500 Internal Error"-message which we interpret as a positive
>> response and rejects the comment.
> 
> No, the error is because the spam filtering plugin raises an exception
> when it's rejecting likely spam.  Here Akismet is rating the content
> "anonymous" as spam, which is occurring because Alec added the username
> as content that should be checked for spam since the attachment spam was
> using a large username full of spam URLs.  Apparently Akismet isn't
> working well with this change.
> 

I've done some more investigation now, and it seems like the string
"anonymous" is only considered spam for certain "user_ip" values.
Hopefully this means that akisment rejects all comments from certain
blacklisted ip addresses.
This might explain most of the "rejected content u'anonymous'" entries
I've found in the log but not all. A few users still seems to have
problem with false positives.
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