If you no longer want to automatically forward your mail, follow these instructions:
1. Open the Gmail account that you forward from.
2. Click the gear in the top right.
3. Select Settings.
4. Select the Forwarding and POP/IMAP tab.
5. Select Disable forwarding in the “Forwarding” section.
6. Click the first drop-down menu after “Forward a copy of incoming mail to” and check for any addresses listed as “(in use by a filter).” To disable the forwarding filter, choose the Remove option.