Email messages not considered spam are sometimes referred to as “ham.”

Bayesian spam filters are different in that they do both.

Bayesian spam filters build a list of unwanted words over time.

Spam filter

baurka / Getty Images

Then new, unwanted words are added to the list.

But if the message alsocontains the header"GREAT DEALS ON TONER!!!!!"

then the likelihood of it being spam is increased.

Can Spammers Get Past Bayesian Filters?

Butspammersdon’t usually send such ordinary messages because they don’t work well to serve their purposes (i.e.

convince you to buy something or click a link).