Email consolidation

[Adrian Fisher]

Please note that I have 3 PC's (soon to be 4) which each have an email 
account on them.  I now wish to integrate all the accounts to the same 
computer as there are messages on each I do not wish to lose.  They are 
all networked to each other and share a single net connection so 
transfer is possible.  2 of the machines are Linux and this one is WinXP 
but the new one will be FreeBSD and that is the one I want to use most 
of all.  Any help would be appreciated.

Thanks in advance.

Adrian.