Are you using mailing lists in Thunderbird ?
Do you forward a lot of mail ?
If so, this extension may be useful for you.
OBM Lightning Calendar and addressbooks connector
Enables archiving of emails into SugarCRM (v5.5 to v6.1) from Thunderbird. Important: This add-on requires a licence key (request a trial from within the extension). Please visit http://www.opacus.co.uk/opacus-thunderbird-extensions for details.
SugarCRM 6.2.0-7.6.x/SuiteCRM 7.x Integration for Thunderbird
Enables archiving of emails into SugarCRM and SuiteCRM from Thunderbird. Requires a purchased license key (you can request a trial from within the extension).
Enables the archiving of emails into SugarCRM/SuiteCRM from Thunderbird 3 and above.
OpenERP Thunderbird Integration for version starting from 6.1.
Adds a toolbar button to expand address book lists to its recipients - useful to stripe out some of them when sending mail...
This extension displays a warning if you send a message from your private emailID to an address/ mailing list which is not found in your Personal Address Book...
Provides a context menu item for dialing phone numbers on your iPhone.
ReminderFox displays and manages lists of reminders and ToDo's. ReminderFox makes sure you remember all of your important dates via easy-to-use lists, alerts, and alarms, right in your browser without the need for a separate calendar program.
Печать реестра входящих и исходящих сообщений, полученных/переданных по электронной почте.
Scan'Mail is a QR Code generator that allows you to transfer easily information from your mail client to your mobile phone.
Sets message security (sign/encrypt) when sending or saving messages based on recipients' address book entry's field "Custom1".
Copy and paste a name, phone number, address or other text from your Thunderbird address book quickly, with just a single menu click.
Gets supported email formats (text/HTML) by the recipients from LDAP directories.
This Extension lets you send Mails to both, first and second email address...
Provides the ability to start writing a template-derived letter directly from within the address book. Supports also multiple recipients. Supports only TeX and similar systems at the moment.
Makes everyday entries to forms & forums simpler!
Add a sig. with just a Rclick of the mouse and select 'Add Sig.' from the context menu.
(Please, note: What you see in the pic is only an example. ThoseRMine Sorry, you have to make your own tabs. )