The Dutchman accused of launching a massive cyber attack on a spam blacklist publisher in 2013 has been sentenced to 240 days in jail, 185 suspended, in absentia.

Sven Olaf Kamphuis failed to attend his trial in Dordrecht and has repeatedly denied any involvement. Even if he had been in court, he would not be sent to jail because he already spent 55 days on remand after his extradition from Spain in 2013, broadcaster NOS reported.

Kamphuis was accused of being behind a massive distributed denial of service (DDoS) attack on a company named Spamhaus in 2013.

Spamhaus publishes spam blacklists and accused Dutch web-hosting service Cyberbunker of carrying out the attack after it was blocked as a rogue host. Kamphuis was said to be a spokesman for Cyberbunker at the time.

Kamphuis told the AD via Skype earlier this month the charges against him are ‘nonsense, even if I support them’. A British teenager was in 2015 sentenced to 240 days community service for his role in the attack.

Kamphuis was arrested in Spain in 2013 and extradited to the Netherlands where he spent two months in jail on remand. He is now thought to be abroad, possibly in Barcelona or Berlin.