"...We shall not flag nor fail. We shall go on to the end. We shall fight on land and on the seas and oceans; we shall fight with growing confidence and growing strength in the air. We shall defend our email boxes whatever the cost may be; we shall fight on beaches, landing grounds, in fields, in streets
and on the hills. We shall never surrender..."
Winston Churchill,
"The Evil that is Spam",
June 4th 1940.
The speech was really known as "The Retreat from Flanders", but that's far too silly for so serious a matter as spam.