The Sophos report showed that Australia had gone from being 25th in the ranks of spam-sourcing nations in September 2011 to 52nd in the most recent quarter, accounting for only 0.26 percent of the global spam volume.
The top 10 spam relaying nations, accounting for just over half the total were: India, 11.4%; Italy 7.0%; South Korea 6.7%; USA 6.2%; Vietnam 5.8%; Brazil 4.4%; Pakistan 3.7%; China 3.2%; France 3.1%; Russia 2.9%.
ACMA chairman, Chris Chapman, said: "With the ACMA's record in penalising scammers and getting businesses to avoid spamming, as well as our world class Australian Internet Security Initiative, we are streets ahead of many other parts of the world.
"In 2011/12 the ACMA saw a sixfold increase in spam reports. This massive increase tells us that our awareness activities have worked."
According to the ACMA, in the last financial year, 4200 informal warnings were given by the ACMA to businesses about potential breaches of Australia's spam laws. In addition, following formal investigations, seven formal warnings were given and three enforceable undertakings accepted. The ACMA's e-marketing blog, which encourages businesses to strive for best practice in e-marketing, was also launched.
"These reports help ISPs and universities to protect their networks and their users from infections that generate scam emails, the theft of personal information and the launch of attacks on websites," the ACMA said.
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