Thanks Bob, this is my first experience with RegEx and I'm afraid I'm failing
miserably. I've tried using your code but the cells that are highlighting
confuse me.

When I run the code it highlights cells which contain information but it's
different everytime, I can't see any correlation with the results.

Column L, Rows 1:13



d
..
c
d

@
..
...
..
..
..

The first three cells highlight but the second instances of "D" or
" don't highlight nor do any other cells, just the first
three.

I may not have explained my original request clearly, sorry if I didn't, but
I wanted to highlight cells in column L which aren't in a basic email format
(ie: etc).
So cells without the @ sign and without at least one dot would be the very
least I'd like to highlight (I know email format's can vary wildly).

Best regards,

Gareth