Retiring legacy versions of Transport Layer Security (TLS) protocol | Mailchimp Developer

Release Notes Scheduled

June 5, 2023Action Required
Retiring legacy versions of Transport Layer Security (TLS) protocol
Transactional
What
As of July 18, 2023, Mailchimp Transactional no longer supports Transport Layer Security protocol (TLS) v1.0 and v1.1. We already support TLS v.1.2 and above. If you're not using TLS v1.2 or above, this may require coding changes.

Why
TLS v1.0 and v.1.1 have been sunsetted so we are making the corresponding changes.