The Enforced TLS settings specify whether or not the recipient of your send is required to support TLS or have a valid certificate. The Enforced TLS endpoint supports retrieving and updating TLS settings.
Twilio SendGrid sends all emails with Opportunistic TLS by default, meaning email is sent with TLS, and if the recipient's inbox provider does not accept the TLS encryption, we then send the message unencrypted.
You can optionally choose to enforce TLS encryption, meaning that if the recipient's inbox provider does not accept the TLS encryption, Twilio SendGrid drops the message and sends a block event with "TLS required but not supported" as the description.
Twilio SendGrid has ended support for inbound connections to our platform using TLS 1.0 and 1.1. The Enforced TLS API has not been modified at this time, and you may continue to set version 1.1 as a required minimum to be accepted for your outbound email traffic.
This endpoint allows you to retrieve your current Enforced TLS settings.
The Enforced TLS settings specify whether or not the recipient is required to support TLS or have a valid certificate.
If either require_tls or require_valid_cert is set to true, the recipient must support TLS 1.1 or higher or have a valid certificate. If these conditions are not met, Twilio SendGrid will drop the message and send a block event with “TLS required but not supported” as the description.
Bearer <<YOUR_API_KEY_HERE>>The on-behalf-of header allows you to make API calls from a parent account on behalf of the parent's Subusers or customer accounts. You will use the parent account's API key when using this header. When making a call on behalf of a customer account, the property value should be "account-id" followed by the customer account's ID (e.g., on-behalf-of: account-id <account-id>). When making a call on behalf of a Subuser, the property value should be the Subuser's username (e.g., on-behalf-of: <subuser-username>). See On Behalf Of for more information.
Indicates if you want to require your recipients to support TLS.
Indicates if you want to require your recipients to have a valid certificate.
The minimum required TLS certificate version.
1.1Possible values: 1.11.21.3