With 93.8 percent of spam, Idaho, well above the global spam rate for September 2009 of 86.4 percent, the company says.

Idaho has advanced 43 points since 2008, when it ranked the 44th state more spam.

According to MessageLabs, this difference can be attributed to the “resilient and aggressive botnet market, and increased global spam volume has occurred since the beginning of the credit crisis by the end of 2008.”

There are between four million and six million computers worldwide have been committed to form large botnets responsible for most spam.

Cybercriminals are using these botnets to send more than 87 percent of all spam that works to about 151 million emails a day.

Completing the 10 states is more widespread in Kentucky, in second, followed by New Jersey, Alabama, Illinois, Indiana, Massachusetts, Pennsylvania, Arizona and Maryland.

“Some of the high levels of spam seen across the U.S. can be attributed to the economic problems experienced worldwide since late 2008, and the promotion on the Internet, including high adoption of social networks “said Paul Wood, MessageLabs, Symantec intelligence analyst. “Spammers have taken full advantage of both the economic uncertainty about the reliability and others for their own rewards. Automated tools, botnets, spam resistant and specific campaigns are part of the spammers and tools are constantly evolving from these techniques to outsmart any effort to stop them. No state is immune from the effects of spam.

U.S. territory of Puerto Rico just 83.1 percent of spam, which is one of these states less spam. Other states that had the least amount of spam, including Montana, Alaska, Kansas, South Dakota, Tennessee, Vermont, Rhode Island, Wisconsin and Florida.