A suppression group, or an unsubscribe group, is a specific type of email from which your recipients can unsubscribe. For example, daily newsletter and system alerts can be suppression groups. Manage your suppression groups using Twilio Sendgrid API. You can also specify suppression groups by using an X-SMTPAPI header.
Make sure that the names and descriptions of your suppression groups are recipient-friendly. Recipients can view these names and descriptions when managing their email subscriptions.
You can create and retrieve up to 200 suppression groups for a Twilio Sendgrid account.