Antispam-Solution for Exchange
If some important e-mail address of your firm is an aim of spammer, you have a problem.
It is impossible to delete or rename such e-mail addresses as info@domain.tld or webmaster@domain.tld and that’s why it is needed to find some other way to protect e-mail and reduce spam.
Some time ago I have this problem on my to-do-list. My aim is to find a solution, which is able to act against spam not only on client side, but on server side too.
The most simply and free solution that I tried at first is an Intelligent Message Filter (IMF) by Microsoft.
IMF is since Service Pack 2 for Exchange Server a part of Exchange Server. This filter detects approx. the half of spam mails. For me is a good result, because of the big amount spam.
But because I had some false positives on level 4, I can’t increase it any more.
Some other solution that I will test in near future is ASSP.
I don’t know anything about how powerful is ASSP, but I’ll test it and tell about my experience.