Bem-vindo as Extensões para o Thunderbird.
Adicione recursos e estilos extras para tornar o Thunderbird só seu.
FecharClacks Overhead 1.0.1
por Shane Eskritt
In tribute to the late Sir Terry Pratchett, many users are adding the message "GNU Terry Pratchett" into the email header "X-Clacks-Overhead". Clacks Overhead shows users when this appears in their emails and displays the message included.
Sobre esta extensão
To add this header to your emails, see GNUTerryPratchett.com for instructions.