[Python] "Value is not a valid email address" when sending multiple email addresses using...

I'm using fastapi-mail package, and trying to send multiple files to multiple email addresses. When I send the email to only one email address, the application works as expected. However, when I change to List[EmailStr] for sending to multiple email addresses, I get this error:

not a valid email address


Here is my code:

@app.post("/file")async def send_file(
background_tasks: BackgroundTasks,
email:List[EmailStr] = Form(...), #I Change here before EmailStr = Form(...)
file:Optional[List[UploadFile]] = File(...),) -> JSONResponse:
print(email)
print(file)
message = MessageSchema(
subject="Fastapi mail module",
recipients=email,
body="Simple background task",
subtype="html",
attachments=file)

fm = FastMail(ConnectionConfig(
MAIL_USERNAME=res("MAIL_USERNAME"),
MAIL_PASSWORD=res("MAIL_PASSWORD"),
MAIL_FROM="admin@acsebs.com",
MAIL_PORT=res("MAIL_PORT"),
MAIL_SERVER=res("MAIL_SERVER"),
MAIL_FROM_NAME="send attachment email service",
MAIL_TLS=res("MAIL_TLS"),
MAIL_SSL=res("MAIL_SSL"),
USE_CREDENTIALS=res("USE_CREDENTIALS"),
VALIDATE_CERTS=res("VALIDATE_CERTS")
))

background_tasks.add_task(fm.send_message, message)

return JSONResponse(status_code=200, content={"message": "email has been sent"})

Posting data through Swagger UI:




The error:




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