Thunderbird2 has tag functionality. However, the UI is not good enough. Methods to add tags are annoying if you have many tags. Attached tags are difficult to recognize. Tag Toolbar facilitates the tag functionality.
mails bouncen mit thunderbird
import vcf into thunderbird
“Seek†adds faceted browsing features to Mozilla Thunderbird and lets you search through your email more effectively.
TEBE is a backup extension for the Mozilla Thunderbird email client. It is functionally very similar to the Firefox FEBE backup extension.
kommandozeile für thunderbird, inkl. tag-vergabe per tastatur