Ssl – IIS SMTP and TLS 1.2

Is it possible for SMTP on IIS to use TLS 1.2? We are using Windows Server 2012 R2. According to PCI-DSS requirements, we should be migrating all TLS connections to version 1.2. I am not referring to the websites in IIS themselves, but the SMTP service. While using IISCrypto, I limited TLS to 1.2, and it caused our SMTP with TLS connections to fail. It does not work with version 1.1 either. Only TLS 1.0 seems to work.

I have not been able to find any definitive answers regarding SMTP and TLS 1.2. I am open to suggestions, but please keep in mind that budget is a concern.

Thank you in advance.