For a long time, working with SOAP in Postman was not natively supported and you had to create all requests from scratch or copy-paste them from SoapUI. Now you can import a WSDL file in Postman and autogenerate a Postman collection. Let me show you how.
Step 1: Get the URL of the WSDL file
http://www.dneonline.com/calculator.asmx. The WSDL file is, as expected, available at:
http://www.dneonline.com/calculator.asmx?WSDL
Make sure that you can successfully open the WSDL in your browser before proceeding to Postman.
Step 2: Importing the WSDL file in Postman
Continue.
Finally, click on Import.
The collection will be added to your existing Postman collections. Feel free to rename it as needed.
Step 3: Submitting a request
Send.