Kelihos botnet
... that the Kelihos botnet was once capable of sending 4 billion spam emails a day?
... that the <b id="mwEfI"><a href="./Kelihos_botnet" id="mwEfM" rel="mw:WikiLink" title="Kelihos botnet">Kelihos botnet</a></b> was once capable of sending <span about="#mwt55" class="nowrap" data-mw='{"parts":[{"template":{"target":{"wt":"Nowrap","href":"./Template:Nowrap"},"params":{"1":{"wt":"4 billion"}},"i":0}}]}' id="mwEfQ" typeof="mw:Transclusion">4 billion</span> <a class="mw-redirect" href="./Spam_(electronic)" id="mwEfU" rel="mw:WikiLink" title="Spam (electronic)">spam</a> emails a day?