The same company caused a complaint about a year ago
https://stat.ethz.ch/pipermail/r-help/2008-March/157423.html
The mailing company they are using (iContact.com) claims to have a tough antispam policy. So does everyone, of course.
-thomas
Thomas Lumley Assoc. Professor, Biostatistics
tlumley at u.washington.edu University of Washington, Seattle