The reminder seems nice, except for the fact that its using one of those godawful modal dialog boxes that prevents you from doing absolutely anything else. That crap needs to die a quick death.
No. BLOCKING errors should generate modal dialog boxes. Warnings, hints, information, etc. shouldn't.
He presssed "send" to move on to the next page. He's done with everything, but he REALLY shouldn't go forward or do anything else until he's taken care of this.
Right, it should block the action he was doing, which is within one web page. But the browser modal dialog box blocks all interaction in every tab open in that browser window, which is beyond obnoxious. It's easy enough to pop up one of those lightbox style popups within the webpage instead of blocking the whole damn browser.
Oh cmon man that's disingenuous. Detection of a user choice of an attachment is conscious transmittal of intent. Message analysis is a different layer of intrusion.