Webinar API register confirmation emal not send

[ukrainianinstitute]

Description
There are 2 webinars with same settings (as I see). One of them (id=843 9578 0710) don’t send emal to registrants after registration via JWT API (when participant registers by registering link all work correctly in both cases). Second webinar (id=871 1480 0847) works correctly.

Which App Type (OAuth / Chatbot / JWT / Webhook)?
JWT

Which Endpoint/s?
POST # /webinars/{webinarId}/registrants

How To Reproduce (If applicable)
Steps to reproduce the behavior:

1. Request URL - https://api.zoom.us/v2/webinars/84395780710/registrants/ Headers (without credentials) - (‘Authorization’ => ‘Bearer ’ . $jwt_token, ‘Content-Type’ => ‘application/json’)/ Body - (‘email’=>’’, ‘first_name’=>’’)
2. Without errors
   3.Responce = {“registrant_id”:“YNN3tIYJQc6YM6aJpxEMfw”,“id”:84395780710,“topic”:"‘Grey Bees’ by Andrey Kurkov. Discussion with the Author.",“start_time”:“2021-02-24T18:30:00Z”,“join_url”:“Launch Meeting - Zoom”}

Screenshots (If applicable)
If applicable, add screenshots to help explain your problem.

Additional context
Add any other context about the problem here.

[MaxM]

Hey @ukrainianinstitute,

Thank you for reaching out to the Zoom Developer Forum. I’m not seeing any reason why that Webinar wouldn’t send out emails to confirm a registrant. Are other emails going out for this Webinar? I would make sure that you’re checking the spam folder of recipients to make sure that the emails aren’t going to junk/spam.

Thanks,
Max