SOAP tutorial
SOAP & WSDL service Email Address Validation Service

## Example overview

This example demonstrates:

- The use of raw TCP session operations: ses_connect(), ses_disconnect(), ses_read_line(), ses_write().
- A SOAP call.
- Using the SMTP protocol for email verification.
- Processing the results with an XSL-T engine.

## Example Setup

The service is prepared by loading the SQL file. This performs the following:

- Define a stored procedure for the SOAP service that opens a TCP session, and makes a SMTP exchange without sending a mail body to the server. Read responses from the server and makes an XML document.
- The SOAP service is achieved by defining the /email_service URL to have same functionality as using soap_server() function call.