ABL: An original active blacklist based on a modification of the SMTP.
Pablo M. OliveiraMateus B. VieiraIsaac C. FerreiraJoão P. R. R. LeiteEdvard Martins de OliveiraBruno Tardiole KuehneEdmilson Marmo MoreiraOtávio Augusto Salgado CarpinteiroPublished in: CoRR (2022)