The already compressed file you have leaves you with a few options to
communicate to others, but not to compress further without quite some
loss.
One is to open in QT Pro and save it to smaller *in physical size*,
this is one way to do this (I use QT7 for this purpose): Open the
movie in QT and go to the File menu and pick "Share". Then in the
Share dialog that comes up, choose Email, pick or keep the name and
pick a size, Small will get you a small physical size and that counts
for a lot of MB saved! You get to see what the final size will be as
you choose Size in this dialog.
Next, look at Mail.app and it will appear as an attachment. Drag it
off this and save it to your disk or email it directly.
The best way though is load your movie to a/your server and tell
people to download it from there, there is no tight limit on size this
way, you can FTP up enormous files and download them too. btw, I'm
surprised your email limit is so big, usually it is lower (10MB being
the upper).
Perhaps even better (they process to be available to the maximum range
of users) or at least one painless way is to load it up to YouTube
(you need to sign up (free)). You have two options to be discrete:
one, list as unlisted - meaning unlikely to be found by anyone without
a specific URL); two, list as private or some such characterization
where specific emailed addressed people are listed by you as being
allowed to see.
These last two methods have, imo, the great advantage of enabling you
to email plain text with just a bit of text, the url of your movie,
and no load on the email network, all your recipients able to download
or look at your work at their own leisure without being loaded with
stuff on their email apps...
If you want the best quality and size, don't process any further, and
load to an accessible public server.
--
dorayme