Re: [EAI] Downgrade testing

Some of your failures may be due to the environment and not the 
Downgrade. I ran a 'base' test by sending the email from an ASCII 
address to try and identify which failures are due to the environment 
(firewalls, network, etc.). 

On the Downgrade test, I received replies from all servers except these
echo@nic.fr
echo@tu-berlin.de
echo@cnam.fr (this address does not exist and you get a reject from  
echo@copernic.cnam.fr)

You received replies from the first two but not from three others that I 
did receive a reply from. This is a surprising difference. A base test 
might help explain it.

    -Ernie Dainow

YAO Jiankang wrote:
> btw, the implmentation is based on postfix.
> could TWNIC JPRS NIDA do the similar tests and report the results?
>
> YAO Jiankang
> CNNIC
>
> ----- Original Message ----- 
> From: "YAO Jiankang" <yaojk@cnnic.cn>
> To: "Ernie Dainow" <edainow@ca.afilias.info>; "Stephane Bortzmeyer" <bortzmeyer@nic.fr>; "EAI" <ima@ietf.org>
> Sent: Thursday, August 06, 2009 11:10 AM
> Subject: Re: [EAI] Downgrade testing - Results
>
>
>   
>> we send to the following 10 address, with <eai<ascii>>
>>     
>>>> * echo@generic-nic.net 
>>>> * echo@nic.fr 
>>>> * Echo@TU-Berlin.DE 
>>>> * echo@tu-chemnitz.de 
>>>> * echo@ouain.com 
>>>> * repondsmoi@crdp.ac-versailles.fr
>>>> * echo@cnam.fr
>>>> * ping@stamper.itconsult.co.uk 
>>>> * ping@oleane.net
>>>> * check-auth@verifier.port25.com
>>>>         
>> we get the nice response from the following 6 address
>> echo@generic-nic.net
>> echo@nic.fr
>> Echo@TU-Berlin.DE
>> echo@ouain.com
>> check-auth@verifier.port25.com
>> repondsmoi@crdp.ac-versailles.fr
>>
>>
>> we get the reject information from 1 address
>> echo@copernic.cnam.fr
>>
>>
>> we can not get any response from other 3 addresses.
>>
>>
>>
>> Yao Jiankang
>> CNNIC
>>
>>
>>
>>
>>
>> ----- Original Message ----- 
>> From: "Ernie Dainow" <edainow@ca.afilias.info>
>> To: "Stephane Bortzmeyer" <bortzmeyer@nic.fr>; "EAI" <ima@ietf.org>
>> Sent: Thursday, July 09, 2009 9:09 PM
>> Subject: Re: [EAI] Downgrade testing - Results
>>
>>
>>     
>>> These echo tests were a good suggestion. I ran a base test from an ASCII 
>>> address against all echo servers in the list. All responded except 
>>> echo@cnam.fr. Email bounced with "unknown address", so I  eliminated 
>>> that server from the test, leaving a total of 9 echo servers.
>>>
>>> The success rate for receiving a response from echo servers:
>>> 1) From ASCII, no downgrade      9/9      100%
>>> 2) From EAI, downgrade               7/9        78%
>>>
>>> auth-results@verifier.port25.com provided some SpamAssassin analysis:
>>> 1) BODY: Bayesian spam probability is 1 to 5%
>>> 2) BODY: Bayesian spam probability is 5 to 20%
>>>
>>> For the downgrade test sent to individual participants the results were:
>>> Total Sent    11   (all on different email domains)
>>> Received       9    82%
>>> Blocked        2    18%
>>>
>>> These are not large samples, but it is interesting to see that the 
>>> success rate in both tests were similar, and were in the SpamAssassin 
>>> range of 20% probability of spam.
>>>
>>> I encourage other implementers to run the same set of tests so we can 
>>> get a larger sample and see if there are differences between Downgrade 
>>> implementations.
>>>
>>>    -Ernie
>>>
>>>
>>> Stephane Bortzmeyer wrote:
>>>       
>>>> On Mon, Jun 22, 2009 at 11:19:48AM -0400,
>>>>  Ernie Dainow <edainow@ca.afilias.info> wrote 
>>>>  a message of 41 lines which said:
>>>>
>>>>   
>>>>         
>>>>> The Downgrade test reported on the wiki basically tested against gmail.  
>>>>> It would be valuable to do more testing 'in the wild' to see how  
>>>>> Downgrade traverses various email systems in other organizations.
>>>>>     
>>>>>           
>>>> You can test against various auto-responders which send you back your
>>>> message (if you know other email addresses of auto-responders, do not
>>>> hesitate to publish them).
>>>>
>>>> * echo@generic-nic.net 
>>>> * echo@nic.fr 
>>>> * Echo@TU-Berlin.DE 
>>>> * echo@tu-chemnitz.de 
>>>> * echo@ouain.com 
>>>> * repondsmoi@crdp.ac-versailles.fr
>>>> * echo@cnam.fr
>>>> * ping@stamper.itconsult.co.uk 
>>>> * ping@oleane.net
>>>> * check-auth@verifier.port25.com
>>>>   
>>>>         
>>> _______________________________________________
>>> IMA mailing list
>>> IMA@ietf.org
>>> https://www.ietf.org/mailman/listinfo/ima
>>>       
>> _______________________________________________
>> IMA mailing list
>> IMA@ietf.org
>> https://www.ietf.org/mailman/listinfo/ima