I want to use Emacs with org-mode to export notes using 'letter' class. Texlive is installed in a Mac, and have many classes to export. But Emacs in org-mode only work with: article, report and book:
But when I go to export I get the message:
Unknown LaTeX class 'letter'
If use 'article' and open the generated .tex file changing 'article' with 'letter' and exec from terminal 'pdflatex' passing the .tex file as a param then export a PDF correctly using the letter class. How can I use 'letter' class or others that come with Texlive inside of Emacs and Org-mode?