We're looking into some new spam fighting applications for our clients' Exchange servers. Currently we run Trend Micro's Client Server Messaging Security for SMB.
Today someone told us about a program that, when mail is received from an address (or perhaps a domain) for the first time, sends an email to the sending address asking for confirmation. If no confirmation is received, all messages from that sender/domain (I'm assuming it's configurable) are discarded/blocked/whatever.
I've heard of client programs that do something like this (Qurb). But I hadn't seen a product that does this at the Exchange/server level.
Anyone know of any programs with these characteristics?? Any luck/experience with them??
Any input is appreciated.
Today someone told us about a program that, when mail is received from an address (or perhaps a domain) for the first time, sends an email to the sending address asking for confirmation. If no confirmation is received, all messages from that sender/domain (I'm assuming it's configurable) are discarded/blocked/whatever.
I've heard of client programs that do something like this (Qurb). But I hadn't seen a product that does this at the Exchange/server level.
Anyone know of any programs with these characteristics?? Any luck/experience with them??
Any input is appreciated.
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