Here is my configuration:
IdSMTP1.Host := 'smtp.gmail.com';
IdSMTP1.Port := 587;
IdSMTP1.UseTLS := utUseExplicitTLS;
IdSMTP1.IOHandler := IdSSLIOHandlerSocketOpenSSL1;
IdSSLIOHandlerSocketOpenSSL1.SSLOptions.Method := sslvTLSv1;
I've downloaded the OpenSSL from here, both libeay32.dll
and ssleay32.dll
are in the same folder of my application.
The Indy version is: 10.0.52
The following command is working on my machine:
telnet smtp.gmail.com 587
How to properly connect in a TLS enable SMTP server, in my case Gmail, using Indy?
It seems like IdSSLOpenSSLHeaders.Load
could not find the address to the following procedures, among others:
@IdSslSessionGetId := LoadIndyFunction(fn_SSL_SESSION_get_id);
@IdSslSessionGetIdCtx := LoadIndyFunction(fn_SSL_SESSION_get_id_ctx);
@IdSslCtxGetVersion := LoadIndyFunction(fn_SSL_CTX_get_version);
@IdSslCtxSetOptions := LoadIndyFunction(fn_SSL_CTX_set_options);
@iddes_set_odd_parity := LoadFunctionCLib(fn_des_set_odd_parity);
@iddes_set_key := LoadFunctionCLib(fn_des_set_key);
@iddes_ecb_encrypt := LoadFunctionCLib(fn_des_ecb_encrypt);
This is the message returned from WhichFailedToLoad
:
SSL_CTX_set_info_callback_indy
X509_STORE_CTX_get_app_data_indy
X509_get_notBefore_indy
X509_get_notAfter_indy
SSL_SESSION_get_id_indy
SSL_SESSION_get_id_ctx_indy
SSL_CTX_get_version_indy
SSL_CTX_set_options_indy
des_set_odd_parity
des_set_key des_ecb_encrypt
Here is a quote from the following discussion in the Embarcadero forums:
OpenSSL Version to work with indy 10.0.52
Indy 8, 9, and early 10 versions used custom-built OpenSSL DLLs because OpenSSL did not expose everything Indy needed access to, so Indy had to add a few custom functions to the DLLs. Later Indy 10 versions switched to the official OpenSSL DLLs.
Indy's custom OpenSSL DLLs are no longer distributed anywhere (that I know of), but you can try this archived download:
Some old Indy-specific OpenSSL DLLs are available in Fulgan's SSL Archive folder.
10.0.52 is an outdated release of Indy 10. There have been a lot of changes to Indy 10 since that release. You really should upgrade to a modern Indy 10 release, and then you can use the latest OpenSSL DLLs that are available in Fulgan's SSL main folder.