| 摘要 |
Systems, methods, computer program products, and networks for messaging including sending, receiving and/or tracking messages. In some cases tracking may include updating receipt statuses of sent messages for which receipt notifications were received. In some cases, additionally or alternatively, tracking may include resending messages for which receipt notifications were not received. In some cases, additionally or alternatively, tracking may include receiving receipt notifications for messages which indicate one or more characteristics of the respective receiving systems.
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