How to email a photo with Lightroom that looks nice, but can't be printed with quality?

Photographer wants to send samples of photos to people, but doesn't want the photos to be good enough that they can be printed.

How to do this?

They are using Lightroom 4.  
The way I see this is that if they want the photo to look good on the screen, but not too good, and not to be printable with quality, they should use the following export settings:

For 5 x 7 photo attached
JPG quality set to 60
Resolution set to 72 pixels per inch
Dimensions  504 pixels by 360 pixels

How will a 5x7 with 72 pixels per inch print out?

Is there another method to use?


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Leave the quality alone but add a watermark across the middle or wherever it would prevent the picture being usable.
Paul SauvéRetiredCommented:
The best thing to do is to overlay the  image with a watermark! No one will really want to use the pic to print, and you still get a good idea of the image quality!

Don't print

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Dave BaldwinFixer of ProblemsCommented:
I agree about the watermark.  If you make the quality unacceptable in the download, I would just back to the web page where the pic is better quality and take screen shot and use that.
computerlarryAuthor Commented:
This was a fast and easy solution.
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