I can send a single email to the several hundred email addresses in one of my Google Workspace labels with no problem using the online Gmail web interface. But when I try to send an identical email to the identical label members through the Google Workspace account in Thunderbird 128, it says there are too many recipients in the To: line. Is this limitation being imposed by Thunderbird itself or is it imposed by Google on messages sent from Thunderbird? Google Workspace chat AI bot says it's likely Thunderbird, but is it?