Bounce

Instal Mail Redirect

1. Open the menu in Thunderbird (3 horizontal lines on the top right corner)
2. Click Add-ons.
3. Click Add-ons again.

In the search field type in Mail Redirect and click the magnifying glass symbol.

In Mail Redirect click Add to Thunderbird.

Click again Add.

Select Restart now to activate the plugin.

Bounce e-mails

To bounce e-mails, open it and click the button Redirect.

In the field Resend to: type in the new recipient's e-mail address.

Click Redirect to send off the e-mail.