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Searching for Spam Filter

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I'm looking for a spam filter (hardware / software) that will require the sender to complete a form before the mail is delivered. Does anyone have an idea which filter does that or can recommend a better one?. I will like to run it on exchange.

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by roger99a

You go ahead and get one if you want to make the rest of the world do your work for you. I tend to blacklist servers that use them because every spoofed email you get will be bounced off to some innocent person and now they have to delete your message. This turns you into the spammer instead. Plus, legitimate emailers have to jump through your hoops to get their message delivered and I'll bet there are "important people" who will call your CEO to gripe instead of following instructions and irritate him as well. Get a real spam filter. There are some very good open source spam projects that will do an excellent job for you and not cost you much in equipment or software.

by youngbones

I did get the spam filter to try out and it works for me. I have the option to hold all incoming mail until the sender reply to a temporary address once, and the mail goes through. Also to use the reqular filter and let it analyze the mail and tag it as spam or not and send it to my mail box with or without sending the challenge question to the sender. Also, each user can manage their own hold list if they are given the option, and also you decides which mail boxes to be protected.
So far, it works great and the unique thing is, you can set different options depending on the user.

by youngbones

I did get the spam filter to try out and it works for me. I have the option to hold all incoming mail until the sender reply to a temporary address once, and the mail goes through. Also to use the reqular filter and let it analyze the mail and tag it as spam or not and send it to my mail box with or without sending the challenge question to the sender. Also, each user can manage their own hold list if they are given the option, and also you decides which mail boxes to be protected.
So far, it works great and the unique thing is, you can set different options depending on the user.

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