I am getting 'Service Not Available - 503'. But when I try with postman, it working fine. I have also update remote site access as well. Please specify if some setting needed regarding IP or something. I from Asian region, input if there are server setting needed for IP ? need to add salesforce IP to server or register IP ? anything like that ?

  • To clarify, you are trying to callout from Salesforce to an externally hosted service with a POST request? A Service Not Available response would be coming from your remote server. It might be that you need to whitelist the Salesforce servers on the remote end. – Daniel Ballinger Apr 9 at 7:02
  • Yes, Your understanding is right on path. I am already on that page, but cant figure out which IP should I whitelist on remote server ? there are many given on Asian Pesific section ? Where to get my org/license IP to register ? for all users. – Umer Farooq Apr 9 at 7:35
  • Thanks @DanielBallinger It works with whitelist. I Just whitelist all the available IP ranges for Asian region and it works. Thanks. – Umer Farooq Apr 10 at 5:18

Please refer this help doc for IP Ranges and to understand best practices and why we need to do it. https://help.salesforce.com/articleView?id=000003652&type=1&sfdcIFrameOrigin=null

  • Thanks for your input. I was already on that page. – Umer Farooq Apr 10 at 11:18

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