can the text be in all caps?

Yes. Anything is fine.

Hello Project owner,

Your project is very interesting. This could turn into something great when payment is guarantee. Just a suggestion.

Best regards,

We have changed the payment status to committed - thanks for the suggestion.

please provide feedback

Hi

Your feedback would be very much appreciated.

Regards

I have submitted the revised designs based on your last feedback
Looking forward to your response

Regards

Shino