In the process of becoming compliant with PCI standards and to enforce stronger security practices, we have made numerous changes to our system. You may know about TLS v1, an older security protocol which is being universally deprecated. We are finally moving to adoption of TLS v1.1 or higher. We hope you have made the necessary changes/upgrades on your system to be in line with the norms.
The final date for deprecation of support for TLS v1 is 23rd April 2018.
After WE) disable TLS 1.0, any inbound connections that rely on TLS 1.0 will fail. This will impact all calls made to your server including email and web traffic.