Email this, email that. Email marketing. It's paperless not pointless!
You can use email marketing to promote your products, sell your services or to tell them things you think they'd like to know. Most of all, it'll help you sell.
In summary, the good bits of email marketing are:
Cost effective and super quick. One click and you are sent
Measurable - you can tell if a campaign worked or didn't at the drop of a hat - not like a leaflet drop or cold calling
Email Marketing be very focused to a specific customer group you have
Easy to track if your email marketing was sent, how it was sent and what it looked like when it got there
No paper=environmentaly friendly. Put that in your pipe and smoke it Mr OZone layer.