Fighting Internet spam in Brazil: Historical overview and reflections on combating spam and managing port 25, coordinated by the Brazilian Internet Steering Committee - Hoepers, Cristine; Faulhaber, Henrique 1953-; Steding-Jessen, Klaus; Souza, Carlos Affonso Pereira de; Monteiro, Marília de Aguiar (Cadernos CGI.br estudos, 2017)