Drupal - use l or url function for mailto links

Question

Does anyone know how to use the l() or url() function to create mailto links?

I am running drupal 6.

Answer 1

Preferably none:

l() is useful for the output of internal links:

it handles aliased paths and adds an 'active' class attribute to links that point to the current page (for theming)" see reference

You need none of the above. Same goes for url(). You CAN use them, but why not keeping it simple and just use the HTML anchor tag directly.