Recently you must have heard about AWS to Switch to SHA256 Hash Algorithm for SSL Certificates We are using postfix integration with Amazon SES, I am using default CA certificate as mentioned in the Integrating Amazon SES with Postfix documentation link I am using this ca certificate,Can you please verify that this cert uses SHA256 algorithm so that I would not be affected by this SSL/TLS certificate changes
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I have found a solution for this, you can verify your CA Certificate using the following command curl -k https://www.amazonsha256.com --cacert ca-bundle.crt
more info from aws link, Also have a look at this which shows using openssl how to verify ssl certs link
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