Boomerang • Functionality • Settings • Installation • Download

Here are the Features of the Thunderbird Add-on Boomerang:

• Create and send a Boomerang e-mail to many recipients one AFTER the other
  
• Send a copy of the e-mail to any e-mail address at any point in time
• User-defined order of recipients
• Log entires whenever the e-mail has been passed on during the process