Monitoring Site Changes 
Each TWiki web does an automatic email notification of recent changes. Users can subscribe / unsubscribe themselves in 
WebNotify of each TWiki web. The Perl script 
mailnotify is called by a deamon in regular intervals. The script is sending an automated email to subscribed users in case some topics changed in a web within this interval.
 Configuring Outgoing Mail 
TWiki will use the 
Net::SMTP module in case it is installed on your system. You need to specify the 
SMTPMAILHOST variable in 
TWikiPreferences.
You can use an external mail program like 
sendmail in case the 
Net::SMTP module is not installed. In this case specify the 
$mailProgram in 
twiki/bin/TWiki.cfg.
 Call mailnotify at Regular Intervals 
For Unix platforms: Edit the cron table so that 
mailnotify is called in an interval of your choice. Please consult 
man crontab of how to modify the table that schedules program execution at certain intervals. Example:
% crontab -e
15,45 * * * * (cd ~twiki/public_html/bin; ./mailnotify -q)
The above line will call mailnotify at 15 minutes and 45 minutes past every hour. The 
-q switch suppresses all normal output.
On Windows NT / 2000 you can use a scheduled task.
-- 
PeterThoeny - 16 Mar 2001