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

Answer: 
Indy 10's SMTP component supports SSL. What problems are you having with it?
SMTP is so trivial protocol (unless you use SASL or other exotic authentication methods) that any component would work. Of course, I would recommend our [SecureBlackbox](http://www.eldos.com/sbb/) product. Freeware libraries such as Indy, ICS, Synapse to get SSL have bindings to OpenSSL DLL and also to SecureBlackbox (none of the listed has own SSL implementation).