Thunderbird : sauvegarder son carnet d'adresse et ses mails manuellement.
Il suffit de sauvegarder:
Vista:
Users<username>AppDataRoamingThunderbird
XP:
DocumentsandSettings<username>ApplicationDataThunderbird
Vista:
Users<username>AppDataRoamingThunderbird
XP:
DocumentsandSettings<username>ApplicationDataThunderbird