SHA-256 compatible

That depends on the underlying libraries. The plugin does meet PayPal’s requirements for TLS, which is what matters in terms of its use. Here is some helpful reading on SSL. To understand why we’re dealing with this, read:

https://www.zdnet.com/article/paypal-et-al-web-site-kicked-in-the-saas/

To understand SSL support in Seamless Donations, read:

https://zatzlabs.com/adding-https-support-to-seamless-donations-4-0-16/

And to follow along with the lessons I learned hand-installing my own SSL certificate, read:

https://zatzlabs.com/tricks-i-learned-installing-my-first-ssl-certificate/

–David

P.S. Marking as resolved because SSL is supported.