How to block unknown mail in gmail

There are several ways to block unknown mail in Gmail:

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 and select "See all settings."
3. Go to the "Filters and Blocked Addresses" tab.
4. Click on "Create a new filter."
5. In the "From" field, enter "unknown" or "spam" (without quotes).
6. Click on "Create filter."
7. Select "Block" as the action.
8. Click on "Create" to apply the filter.

Method 2: Using Gmail's "Spam" label

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

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

1. Log in to your Gmail account.
2. Open the email you want to report as spam.
3. Click on the three vertical dots at the top right corner of the email.
4. Select "Report spam" from the dropdown menu.
5. Gmail will automatically move the email to the "Spam" label and block future emails from the same sender.

Method 4: Using third-party plugins

There are several third-party plugins available that can help you block unknown mail in Gmail. Some popular options include:

• SpamAssassin: A plugin that uses machine learning algorithms to identify and block spam emails.
• SpamSieve: A plugin that uses a combination of algorithms and user feedback to identify and block spam emails.
• SaneBlackHole: A plugin that uses a combination of algorithms and user feedback to identify and block spam emails.

To install a third-party plugin, follow these steps:

1. Log in to your Gmail account.
2. Click on the gear icon in the upper right corner and select "Get add-ons."
3. Search for the plugin you want to install.
4. Click on the plugin's name to open its page.
5. Click on the "Install" button.
6. Follow the installation instructions to complete the installation.

Remember to always be cautious when installing third-party plugins, as they may have access to your email account and data.