not send it if the attribute sent_datetime is filled.
If you import a message that was already sent, make sure to set this value.
send it to the recipients if the attribute sent_datetime is empty.
add it to the ticket as an internal note if you specified this channel.
Internal notes are not sent to your customers.
When a message is created, it does not mean that this one has been sent because the creation and sending process are decoupled. Messages are basically sent asynchronously. Once a message has been sent, Gorgias will automatically update the message to fill the time when it was sent (sent_datetime).
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