What Many Anti-Spam Solutions Lack
In businesses with a small volume of email traffic, a spam detection
rate of 97% is acceptable. However, for most businesses, the 3% of spam
that remains undetected can be a problem - not only in terms of
productivity loss but also because of the increased risk that malware is
allowed to enter the business´s network. For this reason, many
businesses look for “Greylisting” when conducting a comparison of hosted
anti-spam solutions.
Greylisting is a process that blocks every inbound email and asks for it to be resent. As spammers´ servers are too busy sending out new spam emails, the request to resend is ignored. When the blocked email is not received a second time, the greylisting process tags the original email as spam and it is quarantined. In this way spam from previously unknown sources is identified as well as spam from known sources, and virtually all spam email is eliminated.
Greylisting is a process that blocks every inbound email and asks for it to be resent. As spammers´ servers are too busy sending out new spam emails, the request to resend is ignored. When the blocked email is not received a second time, the greylisting process tags the original email as spam and it is quarantined. In this way spam from previously unknown sources is identified as well as spam from known sources, and virtually all spam email is eliminated.
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