How to deactivate unknown mail in gmail

To deactivate unknown mail in Gmail, you can follow these steps:

Method 1: Using Gmail's built-in feature

  1. Log in to your Gmail account.
  2. Click on the gear icon () in the upper right corner of the page.
  3. Select "See all settings" from the dropdown menu.
  4. Go to the "Filters and Blocked Addresses" tab.
  5. Click on "Create a new filter".
  6. In the "From" field, enter unknown (without quotes).
  7. Click on "Create filter".
  8. In the "Apply the label" dropdown menu, select "Delete it".
  9. Click on "Create".

This will automatically delete any emails from unknown senders.

Method 2: Using Gmail's "Spam" folder

  1. Log in to your Gmail account.
  2. Click on the "Spam" folder in the left-hand menu.
  3. Check the box next to each unknown email you want to delete.
  4. Click on the "Delete" button at the top of the page.

Method 3: Using Gmail's "Report spam" feature

  1. Log in to your Gmail account.
  2. Open an unknown email.
  3. Click on the "Report spam" button at the top of the email.
  4. Confirm that you want to report the email as spam.

Gmail will then move the email to the "Spam" folder and may also help to block future emails from the same sender.

Note: If you're using Gmail's "Priority Inbox" feature, you may need to adjust your settings to ensure that unknown emails are not marked as important.