As some clients have issues using the mail server I address in a desktop project for sending feedback and crash reports, I am giving CurlSMBS a try which generally can handle proxy settings much better and uploads the data much faster. So far everything looks good.
But the last debug line I receive is a
Header received: 250 2.0.0 ok: queued as xxxxxxxx
Which is as far as it goes. Is there a way to tell the server not to queue but send data immediately via Curl?