According to research from Frost & Sullivan, spam is the number one concern for local enterprises, rating well ahead of viruses, worms, spyware and hack attacks.

The research covered 296 respondents 51 percent of which was from organizations with annual revenues in excess of A$51 million (US$37.6 million).

Author of the report James Turner, said of all the threat management technologies, antispam had the lowest satisfaction rating.

"This is a clear sign that the market has unmet expectations," Turner said.

"Spam had the highest security incident rate of 77 percent and these respondents said their employees complained about spam.