As mentioned, Barracuda Networks seems to have no interest to support their own Barracuda Spamfirewall plugin for Thunderbird. The problem is, that it doesn’t work since Thunderbird Version 2.0.0.4. Here a hack from the user forum to make the plugin work with Thunderbird 2.0.0.4.
If you unzip the .xpi file (it’s really a zip file, just with an xpi extension), and edit the “install.rdf” XML file, you can update the maxVersion value to a number the same as or greater (for example from 2.0 to 2.2) than the version of Thunderbird you’re using, and then re-zip the files into a new zip file with a name ending in “.xpi”. Reinstall in Thunderbird and everything is fine.
Barracuda Spamfirewall plugin for Thunderbird update
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Where can i download this add-on?
Because of license restrictions, we’re not allowed to make the modified Barracuda Spamfirewall plugin for Thunderbird update public.
Where can I get a copy of the unmodified Thunderbird plugin?
You can get this from
Barracuda Networks Beta Program
beta@barracudanetworks.com