You've got PatternCommunicationEmail and PatternCommonNotification on one line, so it's not able to read the pattern.

Edit the file, put a new return in between the two.

If you're having trouble and can see a return between the two lines then it's probably having problems between Windows and UNIX end-of-line characters.

Look at the LED Patterns guide in the wiki.
In order to do that you'd need to use 2 engines, a different led mapped to each engine, and while one is fading out the other would be other fading in.

I did a return (new line) between them, still not working

I am editing trough windows notepad, but I did the same for SMS an call and it is working like charm...

If you haven't already you'll need to restart mce or reboot the tablet.
If you've already done this, and you can see a new line but it's not working, then like I said above there's a problem with the different types of new line character. Notepad is producing the wrong sort.
If you copy a newline from the previous line and paste it that should work.

I did of course restart mce. The right way.
I did a new line with MC, but still not working

I've edited and re-attached the mce.ini you posted a while ago. Give that a try.

Nothing, no LED at new email

It's probably worthwhile to restore the default mce.ini and testing to see if the email led works from there, then edit (carefully) again.

While I had new, reflashed, there was never any LED at new email...

If you go to Settings - Notification Light is the "Email message received" box ticked?
If it's not that, then it's fairly unusual and might not be something that's going to be very easy to diagnose from here.