a.b.s.e has been mentioned. That would seem to give the most bang for the bandwidth used, considering the nature of the data.
Email attachments have always seemed to me to be a 4th-rate way to share something; there's a lot of overhead (33%)--just awful for a 1-time iteration. If you're doing it more than once for the same file, that gets into *terribly wasteful* territory.
Parking the file on a server and mailing a link to that Web address seems more logical to me
--especially if there will be multiple recipients.
For those without a personal Web site, there are even fewer restrictions than on binary Usenet groups at The Pirate Bay's image hosting service (in Sweden):
Bummer. Good to know. This is when *verbose* dialog boxes don't seem like a bad thing. I remember trying to use an app called Free Download Manager and got some vague and confusing callouts. (The developer's first language is obviously not English and I was used to GetRight, which is very well thought out.)
I hate it when authors give such generic names to good software. It makes them difficult to Google.
I use Handy Recovery 1.0 for this
--but versions after v1.0 are no longer freeware . 8-(