Spam is a scourge for anyone who uses e-mail. What can be done to stop spam?
When it comes to spam, there is a constant battle between those who send out spam and those who try to stop it from reaching our mailboxes.
In our mail concept with Exchange servers and Outlook as a client program, there is spam filtering both at the server level and in Outlook, which puts an end to a lot of spam.
A technique used in this context is so-called graylisting. If you want to know a little more about how graylisting works, you can look at this page.