Spam was a type of email.
The Eleventh Doctor's TARDIS became infested with holographic spam after Rory Williams used a superphone to access the Internet. These included a man offering 0% finance, a "Haxor", an invitation to a UNIT Christmas bash, a dog selling insurance, a scam involving the King of Secunda, and the Phishing Doctor. Some of the holograms were left on Phayke in the hope that they would change their ways, while others lured away the Scroungers with their individual scams. (COMIC: Spam Filtered)