The DISCUSSION_EMAIL_POSTING variable determines which users on your site can post to forums by e-mail.
| Value | Description |
|---|---|
| 0 | Allow only forum admins. |
| 1 | Users with roles and permissions. |
| 4 | All logged in users. |
| 5 | Allow known email addresses only. |
| 6 | Allow all site users and guests. |
1
This setting applies to the site as a whole. Project owners can choose to be more restrictive in their own project by selecting a lower value on the project administration page.