RE: [courier-users] What is the best user-based anti-spam solution?

Good safety tip. My provider doesn't backscatter, and I don't have to
provide my userlist, just the domain names to accept mail for. They only
filter spam and AV.

There are lots of providers in this space, so if you aren't happy with what
a vendor can provide you, keep looking.

I still get occasional spam traffic presented for random users, but not
nearly the volume as when we were doing our own BL processing, and certainly
a lot less is getting through.

Your mileage will vary, however, my users are happier, and my headaches are
fewer.


-----Original Message-----
From: Martijn Lievaart [mailto:m@rtij.nl]
Sent: Sunday, May 22, 2005 10:43 AM
To: Mike Horwath
Cc: Robert Pfister; courier-users@lists.sourceforge.net
Subject: Re: [courier-users] What is the best user-based anti-spam solution?

Mike Horwath wrote:

>On Sun, May 22, 2005 at 10:27:49AM +0200, Martijn Lievaart wrote:
>
>
>>Ah, but keep in mind that the external provider must know your valid
>>users, or you'll create backscatter. And that alone is reason for
>>blocklisting by many today. Even the popular spamcop blocklist accepts
>>backscatter as a submission criterium.
>>
>>
>
>Well, I don't know who you have used as an outsourced AS/AV company
>before, but any I have used or checked out in the past actually do
>verify remote before accepting *any* message.
>
>Be careful with your blanket statements.
>
>

Although I until now never saw one do that (and f.i. our IRS gets it wrong,
getting AV/AS from the biigest telecom provider here. But I only said that
you must not create backscatter, thank you for reitterating my point.

M4





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