I had, a long time ago, a non-free email account. Once I get a gmail account I forget about it, but I still have all the emails stored (in Thunderbird format)
I will like to be able to join them with my current gmail account, as is always difficult to make searchs for old emails. The ideal will be keeping the fields like to, cc, etc, but just forwarding everything to gmail could be enough. I'm talking of about 700Mb of information...
Any ideas?