On 9/18/2007, Marrco ([EMAIL PROTECTED]) wrote:
> So whenever a piece of spam pass undetected your sending your
> vacation messages to an innocent person !

There is no such thing as a 'perfect' mail system. Get over it. And they 
aren't 'my' vacation messages, they are my 'cvlients' vacation messages.

> Wow.. that's what I call backscatter.

I agree there is room for argument against the whole concept of vacation 
auto-responders in general (I personally hate them, but when a client 
insists on having this capability...) - and I even understand if someone 
considers them 'spam', and you certainly have the right to block them if 
you want to - but they certainly aren't backscatter in and of 
themselves, eben if they can result in occasional backscatter when a 
spam slips through...

> Ok, I understand that using ASSP there is no such thing as a piece of
> undetected ube, but yours is exactly the kind of configuration
> giving me the most troubles in keeping my users mailbox clean when
> their addresses are used by spammers. And what you do is sending
> unsolicited email. Once a day or once per week, that's not the point.

There is no such thing as a 'perfect' mail system. Get over it.

> Your logic can be applied to c/r systems too, antivirus notification
> or to user validation callouts. I call them backscatter.

? So do I.

Backscatter is caused by a legitimate mail server that does not do 
recipient validation. I most certainly do perform recipient validation 
on all incoming mail that my server is authoritative for, as should 
everyone. Any server that doesn't is either a specialty server that is 
not internet facing, is a relay only server, or is badly mis-configured 
and part of the spam problem.

> And we filter them exactly the same way as other kind of backscatter.

If you have a way of effectively eliminating all backscatter, I'm all ears.

> Again, I know you're not causing troubles because ASSP keeps you 99% 
> sure that your vacation notice never go to forged address, that's not
> always the case. And if you ever seen a mailbox when a spammer
> forges a return address, you know that the most difficult thing to
> filter are all the exotic vacation notice (Abwesenheitsnachricht,
> Abwesenheitsnotiz, Autorespuesta, automatique d'absence du bureau,
> Automatisch antwoord bij afwezigheid, Periodo vacacional, Automatisk
> svar ved, ecc.). Some just quote the subject, so you have to inspect
> the body to try to understand in Chinese etc what they tell you. So
> at least pls use a subject so I can easily filter your email.

Most of my clients don't *want* 'legitimate' vacation messages to be 
blocked.

-- 

Best regards,

Charles

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