You are viewing the Legacy Marketing Campaigns API reference. For guidance migrating to the current version of Marketing Campaigns, see Migrating from Legacy Marketing Campaigns
For the most up-to-date information on the Sender Identities API, please visit the new Marketing Campaigns Senders API.
To protect your sending reputation and to uphold legitimate sending behavior, Twilio SendGrid requires customers to verify their Sender Identities.
You can verify one or more Sender Identities using either Domain Authentication or Single Sender Verification.