On 2010-11-29 Randy Ramsdell wrote:
> lst_ho...@kwsoft.de wrote:
>> Zitat von Randy Ramsdell <rramsd...@activedg.com>:
>>> I am going to have to implement something that drops rejected mail
>>> from one of our aliases.
>>>
>>> The scenario is that we forward to a external server and cannot
>>> match  its spam/UCE rules so our server backskatters mail.
>>>
>>> One way would be to drop all rejects. I think this will work because
>>> our server handles the $users and only forwards known.
>>>
>>> Or what would be the best practices way?
>>
>> Best practice is to not forward mail to destinations which don't
>> accept  it. If the detination has no feature of "whitelist" your
>> server, disable forwarding to that destination. All other options
>> lead to potential mail blackholes which are worse than spam.
>
> I understand this. However, I cannot tell the President of our company
> that he can't use his exchange server and it is beyond my control to
> change the hosted exchange server configuration. I have to forward
> this  mail no matter what I think should be done.

Have you tried talking to the president of your company and/or the
people who can change the hosted exchange server configuration?

> So to rephrase, what would be the best practices way given I have to
> do  forward this email and am powerless to change the design other
> than our  setup which may only include trying to mitigate backskatter?

Then you cannot avoid being a backscatter source or a mail blackhole or
both. Plain and simple.

Regards
Ansgar Wiechers
-- 
"Abstractions save us time working, but they don't save us time learning."
--Joel Spolsky

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