How do you send a thank you email if you don't have the interviewer's email address?
If you don't have the interviewer's contact information, you can still find a way to send a thank you email. Check if the person was copied on previous emails or included on the calendar invite. Or you could check the company's website for bios and contact information. Call the company's office and kindly ask their receptionist or someone else from their team if they can give you the email address.