Use Dropbox for big-sized attachments in Thunderbird via the add-on Dropbox for Filelink

Weeks ago, Thunderbird introduced support (labeled as Filelink) to store big-sized files (as attachments) via powerful online services, such as Ubuntu One, meaning, sending an email with a big-sized attachment can be easily achieved by selecting Ubuntu One as the online storage place.

The mentioned functionality is free of charge, requiring only a regular user account (when using Ubuntu One).

At the moment, Thunderbird offers (by default) two useful-to-store online services, such as Ubuntu One and YouSendIt.

Along with the mentioned services, the user can easily add Dropbox (as an online container for Thunderbird attachments) by installing the Dropbox for Filelink add-on.

In order to enable Dropbox (as an additional Thunderbird attachment functionality):

• first, download the add-on
• install it by navigating to Thunderbird-->Tools-->Add-ons-->"wrench" icon-->Install Add-on From File-->locate the downloaded add-on
• finally, enable Dropbox as the default attachment handler via Thunderbird-->Edit-->Preferences-->Attachments-->Outgoing-->Add-->select Dropbox under Select an online storage service
  

While creating a new email, adding an attachment bigger than 1MB, automatically summons a bottom black-ish panel, clicking Link, pushes the attached file to Dropbox (as Dropbox attachment).

In order to manually attach a file smaller than 1MB, right-click on the top-right attachment-->Convert to-->Dropbox

Worth mentioning
The user can attach files to Dropbox using a different email account (needed/used for Dropbox, the actual service) from the email account used for Thunderbird, meaning, the user can send a new email from myemail1@test123.com and add an attachment to Dropbox (Dropbox using the email account anotheremail@test1.com).