Thunderbird day today? Not sure about that but today is the day where two interesting new add-ons have been posted at the Thunderbird website. The first was the add-on that increased the mass mailing functionality in the web browser. The Unsubscribe From Mailing Lists add-on does exactly that. It provides an option to unsubscribe from mailing lists from withing the email client. A feature similar to the one that Gmail is offering to its users for some time now.

The process is very simply. The Thunderbird add-on will automatically display an option to unsubscribe from support mailing lists in the header of the emails that are send to the accounts that are managed in the desktop email client.

The Thunderbird user needs to click on the unsubscribe link in the header to initiate the process of unsubscribing from the mailing lists. This will display a prompt informing the user that the add-on will open a new email message which, when send by the user, will unsubscribe the email address from the mailing list.

The email usually consists of an email address of the servi