Spillage
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spillage
The answer is A. Exchanging messages between mail servers on different networks.
Factors that may prevent good communicat.
You don't block a network protocol to prevent Trojan Horses from entering your computer. It is the ability to recognize threats and scams that enable you to defend your computer.
While there is no real right way to prevent SPAM (while still receiving your good e-mail), the two tactics that I do/have used seem to be effect for me are:Using blacklistsUsing SpamAssassin