Can i setup thunderbird to empty junk mail on exit

Yes, you can set up Thunderbird to empty the Junk Mail folder on exit. Here's how:

  1. Open Thunderbird and go to Tools > Account Settings.
  2. Select your email account from the list of accounts on the left side of the window.
  3. Click on the Server Settings button next to your account.
  4. Scroll down to the Junk Settings section.
  5. Check the box next to Empty Junk folder on exit.
  6. Click OK to save the changes.

Alternatively, you can also set this option through the Thunderbird preferences:

  1. Open Thunderbird and go to Edit > Preferences.
  2. Select General from the list of categories on the left side of the window.
  3. Scroll down to the Startup and Exit section.
  4. Check the box next to Empty Junk folder on exit.
  5. Click OK to save the changes.

Note that this option will only work if you have the Junk Mail filter enabled for your account. To enable the Junk Mail filter, go to Tools > Account Settings > Server Settings > Junk Settings and select the Enable junk mail filtering option.

Also, keep in mind that emptying the Junk Mail folder on exit may not be the best approach if you need to keep a record of junk emails for any reason (e.g., for reporting spam or for tracking email scams). In that case, you may want to consider setting up a separate folder for junk emails and configuring Thunderbird to move them to that folder instead of deleting them.