Marketing Email Often Flagged as Spam

http://www.btobonline.com/article/20121127/EMAIL13/311279994/study-marketing-email-often-flagged-as-spam
Marketing email accounts for the preponderance of spam reports, according to a study by email deliverability company Return Path. Perhaps as result, inbox delivery rates continue to fall, the company said.

Return Path's “Email Intelligence Report” found legitimate email sent by marketers accounted for 70% of “this is spam” complaints as well as 60% of all hits on spam traps, email addresses used to catch and flag spam. These spam-report results, higher than those for any email source, may be one cause of declining email deliverability rates, according to the report.