Change Font Size/Color on one line of an email automatically generated by a code.

Hi,
I have a code that automatically generates an email. I need the first line to stand out (be in Bold, Red font, font size 24) while the other lines remain normal (font size 11, not bold and in black). Does anyone have any idea how to make this happen? Below is a sample of my code. As it indicates, i want the first line changed and the rest to be left alone. Any ideas?

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email. it should be in regular text, font size 11, color black"

That did it! Thank you so much!
Oh, and the links were very helpful!