curl -X GET https://api.sendgrid.com/v3/global_suppressions/email@example.com -H "Authorization: Bearer $SENDGRID_API_KEY"
Check if an address is globally suppressed
Tests whether a recipient is on the global suppression list, which blocks all sending to them regardless of list membership. Returns 404 when the address is not suppressed. Global suppressions also include unsubscribes from transactional mail.
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