MACROMEDIA COLDFUSION 5-ADVANCED ADMINISTRATION Manual page 274

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10 If you want to use the default load threshold settings, click Next and go to step 13.
11 Enter new numerical values (not higher than 100%) in the Peak Load Threshold
12 Click Next.
13 Enter the name of your outbound SMTP mail server in the SMTP Mail Server field
However, if you do not want to use the defaults, select the server and click
Configure to configure new peak and gradual redirect load thresholds for that
cluster member.
The Load Thresholds dialog box appears:
and Gradual Redirect fields and click OK.
Be sure to keep your Peak load threshold below 100% to accommodate
ColdFusion's processing needs. Set your Gradual Redirection threshold to be
lower than your peak threshold.
The Alert Notification dialog box appears:
and the e-mail address for a recipient of cluster alerts in the E-mail Address field.
If multiple people will receive different alerts for different types of notification
events, go to step 14. Otherwise, click Next and proceed to step 16.
Chapter 12 Configuring ColdFusion Clusters