As more and more gateways are required to switch to TLS 1.2, iPayment also makes changes to accomodate this.
This article will give an overview of the earliest versions that support TLS 1.2 for each supported gateway.
Secure Trading: Supported since version 2017.0.6.0
CyberSource: Supported since version 2017.0.6.0
Authorize.Net: Supported from version 2017.0.4.0
Moneris: Supported from version 2017.0.2.2
Eway: Supported from version 2017.0.2.2
Cayan: Supported since the release in version 2017.0.6.0