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Learning Zimbra Server Essentials by Abdelmonam Kouka

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Internal solutions

In this chapter, we will present the best solutions that we can implement inside the Zimbra environment; that's why we call them internal solutions.

Enabling DSPAM

The way Zimbra handles spam is not very effective and it doesn't resolve most users' needs. In fact, it relies on SpamAssassin to filter spam/ham mails, and this heuristics-based method, in my opinion, is very old and inadequate, though it does catch a lot of spam. Besides, rules should be added/updated on a regular basis in order to face a spammer's new methods.

On the other hand, DSPAM has another approach to filter spam: a statistical method that "learns" better how to detect spam. This learning is simply done when you repeatedly show DSPAM examples of spam by marking ...

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