Are you aware of any regulations about using (within law) emails for advertising? In Poland we have a law against spam that - basically - allows me to send a single email stating something like "We are a Bluewidgetcorp, producers of cheap and reliable blue widgets, if you are interested answer Yes to this email and we will send you more details." As long as I don't put too much details into the email I am more or less on the safe side (plenty of a gray area here, but you should get the spirit). Is there a similar law in other parts of the world, or is the use of email for advertising completely prohibited? Note I am not writing about sending Viagra emails to 200 millions of random addresses, but of sending offers to a selected group of recipients, something like blue paint offers to all blue widget producers.