On callout to external webservice from apex, an error is received as :"System.CalloutException: Unexpected end of file from server".
From Postman with the same request and header it works,.
Could you please help in this.
1 answer
Please check if external webservice you are using, needs any IP whitelisting and whitelist all salesforce IP ranges provided here
https://help.salesforce.com/articleView?id=000003652&type=1
