flask-mail

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I use flask_mail in blueprint，app = Flask(__name__) in app.py so I first from app import app in blueprint then set sender app.config["MAIL_DEFAULT_SENDER"] finally mail = Mail(app) when run msg = Message(subject="xx", recipients=[xx], body=info) and mail.send(msg) raise an error：sender = sender or current_app.extensions['mail'].default_sender

I think it's the reason why app is referenced in the blueprint when I set app.config["MAIL_DEFAULT_SENDER"] and mail = Mail(app) in app.py And I do not import app but import mail in blueprint it works

I can't reproduce this issue with the information provided. If it's still happening, open a new issue with a minimal reproducible example, including the full traceback.