Purpose:Local Web Service is available in Siebel Enterprise Application version 7.5 and higher. Local Web Service provides customers with the ability to invoke inbound Web Service locally. When calling Local Web Service by the outbound Web Service, the request will not pass through the web server but directly call to the inbound Web Service. By using this characteristic you can use Local Web Service to test web service on a dedicated client.Follow given steps for setting up an Inbound Web Service as a Local Web Service

In general a developer or BA should avoid Siebel scripting where possible or to go for that  to a minimum . Attempt to meet business requirements by configuring in Siebel Tools where possible and generally implementing scripts for minor functionality where a given functionality cannot be met using declarative configuration.
Here are the list of Best practices for sibel scipting by siebel experts.

How Do You Send Email via Siebel Scripting or Object Interfaces Using Outbound Communication Manager                  
 
The Communications Outbound Manager processes outbound communications, for email, fax, wireless message, or page channels. It also supports outbound capabilities for Siebel Email Response and for the Send Email, Send Fax, and Send Wireless Message commands.
For further information, refer to Siebel Bookshelf version 7.5.x > Siebel Communications Server Administration Guide > Administering Siebel Communications Server > Administering Communications Outbound Manager.
Here is the eScript sample code:
//—-start
//instantiate the business service and the propertysets
var bs = TheApplication().GetService(“Outbound Communications Manager”);
var …