Let me just vent about a pet-peeve of mine.
To all of you out there in the printing industry, drop the “300 dpi” resolution requirement verbiage already. It doesn’t work. DPI is a ratio. Ratios do not work as definitive resolution requirements; pixels do. A 30 pixel x 30 pixel image is 300 dpi at .1″ x .1″. If I set such a tiny image’s resolution to 300 dpi in Photoshop and send it to you, does that mean you’d be able to use for print?
Many high resolution cameras for some reason save their images at 72 dpi by default. That does not mean those images are not high enough resolution to be used in print. That simply means you have a 3000 pixel by 2000 pixel image set to “print” at almost 42″ wide. Do a simple image size adjustment in an editing program to change it to 300 dpi and you’ll find that it will be printable at 10″.
The problem comes down to the fact that you have account reps enforcing some “300 dpi” rule they don’t understand the principles behind. And we have other equally-ignorant people trying to send you images. You’re telling them they’re not are abiding by the rules and they don’t know the better than your rules are stupid and the images are F-I-N-E fine.