@inproceedings {269658, author = {Eric Allman}, title = {The State of the Spam}, booktitle = {2004 USENIX Annual Technical Conference (USENIX ATC 04)}, year = {2004}, address = {Boston, MA}, url = {https://www.usenix.org/conference/2004-usenix-annual-technical-conference/state-spam}, publisher = {USENIX Association}, month = jun }