Question: Indy is not enough for me, it must support SSL and be rock solid, can be commercial also

Answer: 
Icsn (and Ics-ssl) components at :
<http://www.overbyte.be/frame_index.html>
I've used IP\*Works SMTP component before. I didn't do anything involved with them, I used them to send an email with error information basically. I have never used the SSL version either.

I don't believe you can purchase the components individually either.

<http://nsoftware.com/ipworks/components.aspx>