Hab nur mal kurz in unsere Sourcen geschaut.
Wir verwenden nur noch IndySSLHandler.SSLOptions.Method := sslvSSv
Remy LeBeau empfiehlt SSLOption.SSLVersions zu verwenden:
Zitat:
You need to stop using the SSLOption.Method property if you are still using it. Use the SSLOption.SSLVersions property instead. That will allow you to enable multiple SSL/TLS versions at a time.
https://stackoverflow.com/a/27262011/80901