What are the pros and cons of email lists versus discussion boards?

What are the pros and cons of email lists versus discussion boards?

- Usually focused one particular topic.
- It has the ability to communicate to many people, regardless of where they are located.
- Ability to use rules for filtering (example's of these, top and bottom posting methods).
- Can be moderated with the ability to remove uncooperative members (for example, specific reply method and Bcc).
- Messages are usually archived on list server for future reference.

Cons:

- Greater volume of traffic (too many people involved in the one message).
- Email can be seen by all members subscribed to list.
- If list server is down no one is able to send or receive emails, i.e. relying on third party for, hence the email device is technologically specific and dependent on reliability of user factor.