Lots of free file hosters out there. Mediafire.com as an example. Upload a file there, copy and paste the download link you are given into your email to the client, then delete it as soon as the client successfully downloads it. Mediafire has 10 gb storage for free accounts.
Email is limited to 10 MB on attachments. So that's where file hosting comes in.
Email file size limitations vary based on ISP policies and host policies. To be safe, keep attachments below 10 MB (or in some cases 5 MB), but it is not an ironclad rule. Yousendit.com is another outfit offering the ability to provide access to a large file; other possibilities would be box.com, dropbox.com, and acrobat.com.
True. There are a lot of variables with email and many file hosters. I was keeping the answer simple for the poster.
For the cautious shopper here is a more thorough comparison. Comparison of file hosting services - Wikipedia, the free encyclopedia
forget email - use dropbox, boxie, or similar...
i like mega.com