Email AC colour coded

[Guest]

Running 4.2.1 on HTC One X+.

I've a few email accounts and use the stock email client and All Accounts. The colour coding on the left is great to show what account the email is from but it only appears for new messages. Once I read the message it loses the colour code and I've no visible way of knowing what ac the email is from.

Is there any way to keep this colour visible even after the email is read? I though it used to stay that way on my old desire Z but cant fully remember. I know K9 does this but I'd prefer to stick with stock if possible.

Many thanks

gerryR