To edit a Thru message from the Sent Items tab:
Double-click any message; the “Edit Thru message” window opens. You can also right-click any message and click Open.
This window shows additional details of a Thru message like the tracking number, expiration date, message body, attached files and whether or not the message has a password requirement to download files.
From here you can make multiple changes to a Thru Email after it has been sent.
Note: Be sure to always click “Save Thru and Close” after making changes.
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