Separate partitions for email and webbrowsing

[alex]

I have multiple versions of ubuntu installed and have a problem with 
maintaining continuity in email.
Each ubuntu is configured somewhat differently except they all have the 
same version of Thunderbird with identical mailboxes but their contents 
are different so the threads are divided up betweem the multiple ubuntus.

I was thinking of having a separate partition dedicated to Thunderbird 
and perhaps another for Firefox so that whatever email is received by 
one of the ubuntus will be available to the other ubuntus.....something 
like havimg a /home partition shared between two linuxes.

Is this a harebrained idea or is it workable?   If it sounds OK, how 
would be done?


elmo aka alex