Modifying email html content

Hi ZenMasters,
All good hope so..

I'm trying to modify the HTML formatting text that is send out in the notifications and include some Bold and/or collored texts.

Have anyone been able to achieve such customization Or, it seems that this is a google/gmail limitation, are you guys aware of that By Google'ing about this subject, it seems so.. however the works fine inside the notification.

My goal is to use bold in some parts and in a near future, to include some collored texts like below:

Component: /${evt/component}

Another attempts that did not work:
[B] Component: [/B] /${evt/component}
{B} Component: {/B} /${evt/component}

Thanks for your time here and your help.

-Daniel Szortyka