Are You a Spammer?
In the effort to deal with spam, almost everybody has some kind of spam filter either built-in to their email client or provided by a service. I know, personally, that once I've trained my spam engine, I never look in the "Spam" folder and only give a cursory glance to the 20 or so emails that end up in my "Maybe" folder every day to see if any emails were misclassified as spam.
How sure are you that your emails are getting through to your intended recipient? Answer: you can't be sure. Send an e-greeting card to a friend? Might have been shuttled to their spam folder. What about sending a quick link to some colleagues? If you don't provide some supporting text, there's a good chance your co-workers will never see it.
It's an even bigger problem for permission marketers who depend on email to maintain a non-spam relationship with their customers. Entire companies like Return Path have sprung up to ensure that "the email must go through".
Mr. Permission Marketing himself has found himself in this trap and sees RSS as the way out. All I can say is: yes, Seth ... hold on, we're working as fast as we can!
Source: Seth's Blog: Seth Godin: Spammer