Hi Rodrigo.
wodSmtpServer is by default compiled with OpenSSL 0.9.7, which means that it supports only TLS 1.0.
On request, we can compile with OpenSSL 1.0.2 so it would support up to TLS 1.2.
If you need it, please send us a ticket and we'll send you binaries there for test.
Kind regards,
Jasmine.