Denver—Once again evading legal efforts to stop them, some spammers are adopting Sender Policy Framework, or SPF, in order to make their messages look less spamlike.
E-mail security company MX Logic found that 16% of spammers have published SPF records. Its study encompassed 400,000 spam e-mail messages that passed through the MX Logic spam filter, called the MX Logic Threat Center, from Aug. 29 to Sept. 3.
MX Logic, which also tracks spam on a monthly basis, said the percentage of e-mail that are classified as spam continues to increase as well. Ninety-two percent of all e-mail was spam in August, up from 84% in July.