Automatic Email If Value In Range Of Cells

I've been to Ron de Bruin's site. Very helpful; I got the code below from him which sends starts another bit of successful code - email_via_Outlook. The automatic email part works fine. But it only checks the one cell (E3). I've tried getting it to look at E2:E10 but to no avail. Someone said on another forum that the line "If Target.Cells.Count > 1 Then Exit Sub" stops it from checking a range of cells. I want it to check E2 to E10. I also tried another bit of code which read E2:E10 but emailed every time the worksheet was opened; I only want one email sent for every time a line dips below 30.