Anti Spam Loesung in der DMZ

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Hallo NG,

wir haben eine DMZ, in der ein SMTP Server (W2K3 mit IIS/SMTP) steht. Im LAN befinden sich drei Exchange Server 2003 Standard und Enterprise. Wir möchten jetzt den SMTP Gateway in der DMZ mit AntiSpam Funktionen ausstatten.
Habt Ihr Empfehlungen welchen Hersteller / welche Software ich verwenden kann? Der Server soll ein Windows Server 2003 bleiben.
Gibt es in der Forefront Palette ein Produkt was das kann? Auf dem SMTP Gateway soll nach Möglichkeit kein Exchange installiert werden.

Was ist mit dem Exchange 2007 Edge Server. Könnte ich den auch implementieren wenn die Umgebung dahinter Exchange Server 2003 ist?

Danke im voraus

Gruss Walter

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