The company said only 1% of spam conformed to the provisions of the five-month old law, the lowest level since January and down from 3% in April.
Spam complying with the US CAN-SPAM Act dropped in May, according to MX Logic Inc, which tests samples of spam received every month.
The company said only 1% of spam conformed to the provisions of the five-month old law, the lowest level since January and down from 3% in April.