Ask HN: How often do you e-mail your users?

How often do you e-mail your users?

  1) With a general newsletter announcing new features
  2) With updates specifically for a particular user

Trying to gauge how often is too often. We're pushing out new features at such a rapid pace that we can fill newsworthy content into a weekly email, but we don't want to piss people off.

On top of that, we would love to send notifications & reminders to let particular users know when something that we think would be of high interest to them happens on their account.

But, combined, users would be getting an email from us every day or two, which is overwhelming (and annoying... mostly annoying) for most people.