Junk e-mail was costing Hong Kong up to $10 billion a year, according to a survey of local internet service providers.
The study was published by the Hong Kong Anti-Spam Coalition on Tuesday. It said that 50 per cent of all e-mail received in Hong Kong was spam, with 20 to 40 per cent of it sent from Asia. Five per cent originated in Hong Kong, the study found.
The coalition said the findings supported its calls for government regulation of the spam problem.
However, the Office of the Telecommunications Authority (Ofta) warned that legislation could simply drive local spammers to register overseas.
The Anti-Spam Coalition, backed by industry groups including the Hong Kong Internet Service Providers Association (HKISPA), the Asia Digital Marketing Association (ADMA) and companies including Microsoft and Time Warner, was formed last year in a bid to combat the fast-growing spam problem.
HKISPA chairman York Mok said the findings proved that the problem reached well beyond the technology industry. 'The impact on the local service providers is quite significant, but in terms of the financial impact on the Hong Kong economy, it's also very remarkable.'