Indy 9 does not natively support TLS 1.2. However, the community has backported support using a modified version of OpenSSL 1.0.2 (which supports TLS 1.2) and patched Indy source files.
Attempting to use 64-bit DLLs on a 32-bit compiled Delphi 7 application. 🛠️ How to Fix the Error 1. Download the Correct Indy 9 Custom DLLs Delphi 7 Indy 9 Could Not Load Ssl Library
procedure LoadSSLVerbose; var ErrorCode: Integer; begin if not LoadOpenSSLLibrary then begin ErrorCode := IdSSLOpenSSLHeaders.GetOpenSSLError; ShowMessage('SSL Error Code: ' + IntToStr(ErrorCode) + #13#10 + 'Last OS Error: ' + IntToStr(GetLastError)); // Common codes: // 0: DLL not found // 1: DLL loaded but function mismatch (wrong version) // 126: Module not found (missing VC runtime) end; end; Indy 9 does not natively support TLS 1
Add IdSSLOpenSSLHeaders to your uses clause. After the error, call WhichFailedToLoad() to see exactly why it failed. Check Paths 🛠️ How to Fix the Error 1