Trying to send SSL email but cannot load library...

[rlebeau]

However, when it runs I get an exception which logs this

ERROR: Exception during email send: Could not load SSL library.

What does Indy's WhichFailedToLoad() function report after that error occurs?

But what is required on the Linux system for the SSL email to work?

OpenSSL 1.0.2 or earlier, if you are using TIdSSLIOHandlerSocketOpenSSL.

On windows I think I had to get some dll to make this work...

Yes, ssleay32.dll and libeay32.dll. On Linux, libssl.so.<version> and libcrypto.so.<version> are used instead.

After searching the web I found that there might be a ssl version clash here.
Installed on my RPi3 test machine is this:

Code:

$ openssl version -v
OpenSSL 1.1.1d  10 Sep 2019

TIdSSLIOHandlerSocketOpenSSL does not support OpenSSL 1.1.x. Try this experimental SSLIOHandler instead (I don't know if it has been tested on Linux, though).

In another reply in the same thread there is a statement that FPC 3.2.0 fixes all of that, but I have FPC 3.2.0 + Lazarus 2.0.12 on my RaspberryPi and it still issues these errors!

Those fixes refer to FreePascal's own HTTP/OpenSSL implementation, not to Indy's.