How to block forward mail to another gmail account

To block forward mail to another Gmail account, 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 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 the email address of the account you want to forward mail to.
6. Click on "Create filter."
7. In the "Apply the label" dropdown menu, select "Never send it to spam" and then click on "Create."
8. This will block forward mail to the specified account.

Method 2: Using Gmail's "Forwarding and POP/IMAP" settings

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 "Forwarding and POP/IMAP" tab.
4. Scroll down to the "Forwarding" section.
5. Click on the "Add a forwarding address" button.
6. Enter the email address of the account you want to forward mail to.
7. Click on "Next."
8. Click on "Add" to add the forwarding address.
9. Go back to the "Forwarding and POP/IMAP" tab and click on the "Save Changes" button.
10. This will forward mail to the specified account, but you can still block it by following the steps in Method 1.

Method 3: Using Gmail's "Filters" feature with a custom subject line

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 "Subject" field, enter a custom subject line that will trigger the filter (e.g. "Forward to another account").
6. Click on "Create filter."
7. In the "Apply the label" dropdown menu, select "Never send it to spam" and then click on "Create."
8. This will block forward mail to the specified account with the custom subject line.

Note: Make sure to test the filters and forwarding settings to ensure they are working as expected.