OT: SORBS a PITA on spam backscatter ...

[Hugo van der Kooij]

On Wed, 13 Jun 2007, Hugo van der Kooij wrote:

> On Wed, 13 Jun 2007, Garry Glendown wrote:
>
>>  Sorry, this is most likely somewhat off topic, but maybe I could get
>>  some suggestions ...
>>
>>  One of our customers was hit by a presumably larger amount of spam
>>  mails, addressed to mail addresses collected somehow, but with errors in
>>  the addresses (first part of the mail address duplicated, like
>>  "johnjohn at do.main" instead of "john at do.main"). They are operating a
>>  multi-level mail service, with MS on our side, delivering to an SMTP
>>  proxy, then over through a virus scanner, and finally to the actual mail
>>  server (M$ Exchange). Mails are accepted, even by the Exchange server,
>>  which in turn generates a non-delivery receipt for wrong addresses.
>
> Don't we just hate Exchange for this? Perhaps you should just let them have 
> all the spam untill Exchange behaves correctly. Or setup some trick to learn 
> wether or not a receiver address is in fact valid before you accept it.
>
> Such an LDAP link is part of the competition.

The closest thing I have seen online is a static method:
http://www-personal.umich.edu/~malth/gaptuning/postfix/

Hugo.

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