Detraction sina mail

I think you meant to ask "What is detraction in Sina Mail?"

Detraction is a feature in Sina Mail, a popular Chinese email service, that allows users to report and block spam or unwanted emails. When you mark an email as "Detraction", it will be flagged as spam and removed from your inbox. Additionally, Sina Mail's algorithm will also learn from this action and improve its spam filtering capabilities.

Here's how to use detraction in Sina Mail:

1. Log in to your Sina Mail account.
2. Open the email you want to report as spam.
3. Click on the three dots at the top right corner of the email.
4. Select "Detraction" from the dropdown menu.
5. Confirm that you want to report the email as spam.

By using detraction, you can help keep your inbox clean and free from unwanted emails.