• Thunderbird: auto delete duplicate messages
  The add-on searches a given folder for duplicate messages and automatically deletes them by tagging all duplicates with a delete flag and one message with the keep flag.
  By applegrass in Software > Thunderbird with duplicatemessages thunderbird thunderbirdextensions
• Remove Duplicate Messages
  If you have duplicate messages (e.g. from merging folders or downloading messages several times) you can use this tool to find and remove them from the selected folder and its subfolder by rightclicking on a folder and choosing "Remove...
  By applegrass in Software > Thunderbird with duplicatemessages thunderbird thunderbirdextensions
• mailredirect extension
  The mailredirect extension for Mozilla Thunderbird adds ability to redirect one or more mails to one or more recipients.
  By applegrass in Software > Thunderbird with mailredirect thunderbird thunderbirdextensions
• 10 must-have Thunderbird Addons (+ 25 more) » MakeUseOf.com
  
  Mozilla Thunderbird is an Outlook-like email client, but way better. It's free, it's multi-platform, it's multi-lingual and most importantly, it's highly
  email lists productivity tools
  By applegrass in Software > Thunderbird with thunderbird thunderbirdextensions
• View and update Google Calendar with Thunderbird
  a detailed tutorial on how to sync and update Google Calendar with T-bird using the previously-mentioned Lightning calendar extension.
  By applegrass in Software > Thunderbird with calendar googlecalendar lifehacker thunderbird thunderbirdextensions
• Eight killer Thunderbird extensions
  By applegrass in Software > Thunderbird with extensions lifehacker reinstall thunderbird thunderbirdextensions todownload toinstall

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