Vitaliy,  Not answering to your question,  my suggestion is to skip
thunderbird, and go for Gmail.  And with GTDinbox as well Google Calendar,
you may also get a project tracking system that you asked last time.

I have just migrated to Gmail after my portable drive failed.  I was doing
portable thunderbird, portable sunbird, and portable firefox.  And with no
warning signed, it crashed.  I can't afford the time or have the discipline
for a fail-safe backup schedule, I am opting to pay Google if they want to
charge next time.

Ling SM
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