[ILUG] Is my mail safe with rsync?

[Timothy Murphy]

Curious question for you gurus.
Laptop 1 (william) is dying, so I transferred everything to laptop 2 (martha),
using rsync.
Unfortunately I forgot to turn off mail collection on william,
so it has a certain amount of new email.
Can I safely transfer it to martha using rsync?
Are the filenames of the mail items unique?
A typical item in ~/Mail/inbox/cur is called 1081206072.2310.mjCn:2,S

I should say I am using KMail under Fedora-1.
(I tried going over to Mozilla Mail but found it too complicated.)

Incidentally, what does rsync do if it finds a completely different file
with the same name?
Does it just overwrite it?

What would I do without ILUG?
(Don't say, RTFM.)

-- 
Timothy Murphy  
e-mail (<80k only): tim /at/ birdsnest.maths.tcd.ie
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland