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Output for 8.1.0 - 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.19, 8.4.1 - 8.4.6
array ( 'Undelivered' => '2355', 'Sent' => '1', 'Bounced' => '1', 'Delivered' => '1', 'Opened' => '1', 'Completed' => '1', )

preferences:
73.89 ms | 411 KiB | 5 Q