The Alibaba Mail will prompt some obvious errors in the recipient's address with icons and messages in the email editing page.
Yellow exclamation mark: This is an external account. For information security, proceed with caution.
Red exclamation point: The address format is incorrect. Click the icon to modify.
Description
1. This is an external account. For information security, proceed with caution.
2. The address format is incorrect. Click the icon to modify.
