I've been searching around the internet, and I can't seem to find any info on how to address things in letters or gifts. I've tried the dictionary, but it just sounds weird...

So I was wondering how would you say things like "To" and "From" in Vietnamese

Also, how would you begin and end a letter?

For "Dear..." I know that you can say "Thưa ... " but wouldn't that sound too formal for a family member or close friend?

I'm also looking to learn equivalents of "Sincerely" "Yours Truly" "Love" etc...

Thanks ahead of time for your help