We are using sendgrid to send our e-mails. We turned on the “link tracking” feature and also followed the instructions here: Content Delivery Networks | Twilio
It didn’t work. We got ERR_SSL_VERSION_OR_CIPHER_MISMATCH
I opened a ticket on sendgrid and their answer was: " I do want to clarify that our team is unable to troubleshoot the error based on the settings within a given CDN. While it looks like you have the correct records pointing to the right place, the error we are still seeing within your HTTPS wrapped link is:
ERR_SSL_VERSION_OR_CIPHER_MISMATCH . I would recommend reaching out to your CDN support team to inquire the exact nature of this error. The certificates will live within the CDN and from our platform we are unable to troubleshoot the misalignment."