admin/setting/userdefaultpreferences
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User default preferences allow a site administrator to specify the default values for some of the user profile options including:
Email display
Allow only other course members to see my email address
[default]Hide my email address from everyone
Allow everyone to see my email address
Email format
Pretty HTML format
[default]Plain text format
Email digest type
No digest (single email per forum post)
[default]Complete (daily email with full posts)
Subjects (daily email with subjects only)
Forum auto-subscibe
Yes: when I post, subscibe me to that forum discussion
[default]No: don't automatically subscibe me to forum discussions
Forum tracking
No: don't keep track of posts I have seen
[default]Yes: highlight new posts for me
