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postfix-users: Re: Fighting Backscatter

Re: Fighting Backscatter

From: <fakessh_at_nospam>
Date: Mon Oct 18 2010 - 18:43:43 GMT
To: postfix-users@postfix.org

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Le 18.10.2010 20:06, Wietse Venema a écrit :
>> 1) SpamCo forges a message from innocent@victim.com and sends it to
>> myaunt@familyname.com
>>
>> 2) My server (familyname.com) accepts the message because
>> myaunt@familyname is a valid recipient that appears in my virtual
>> aliases file, then forwards the message (based on the info in that
>> virtual aliases file) to my aunt's actual email address of
>> auntiemildredloveskitties@cox.net
>
> 3) YOUR SERVER tries to forward the SPAM to Cox.
>
> 4) Cox rejects the SPAM.
>
> 5) The SPAM is still on YOUR SERVER.
>
> 6) YOUR SERVER "returns" the SPAM to an innocent person.
>
> 7) YOUR SERVER is blacklisted because it sends backscatter.
>
> Wietse
yes

++ plus plus Wieste

- --
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x092164A7
gpg --keyserver pgp.mit.edu --recv-key 092164A7
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