Hallo,

http://www.spamresource.com/2007/02/backscatter-what-is-it-how-do-i-stop-it.html

What is it?
Backscatter is a certain kind of mail you receive that you didn't ask to
receive. If you've ever received a “Your mail could not be delivered”
bounce notification, a “Your mail contained a virus” notice, or a
request to confirm your signup request for a mailing list you've never
heard of, you've probably received backscatter. The backscatter problem
is inherently linked to the spam problem, as most backscatter received
is due to somebody else on the internet doing something bad and
spam-related.

Secara singkat, backscatter adalah notification yang salah arah akan
tetapi juga seringkali dimanfaatkan spammer untuk kirim spam mail.

MDaemon sejak lama menerapkan BATV untuk mencegah BackScatter ini (lihat
http://en.wikipedia.org/wiki/Bounce_Address_Tag_Validation).
Cara pengaktifan di MDaemon sbb:

http://mdaemon.dutaint.co.id/12.5/index.html?security__backscatter_protection_dialog.htm

[x] Enable Backscatter Protection
[x] Reject messages that fail Backscatter Protection verification

Catatan:
Kalau punya lebih dari incoming MX server, BATV key perlu dishare di
semua server.
Lokasi file backscatter rsa key di \\mdaemon\PEM\_batv\rsa.private


-- 
syafril
-------
Syafril Hermansyah
Running MDaemon 12.5.2 Release Edition

Destiny is a good thing to accept when it's going your way. When it
isn't, don't call it destiny; call it injustice, treachery, or simple
bad luck.
        -- Joseph Heller, "God Knows"


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