What did you do, to try to get it working?
This because there are several possible solutions in this thread!
Well, I tried the solutions that you posted - using the emailer.php that you so kindly made available. I tried the 3 file fix that AcydBurn posted with the contributions of others (previous to trying your file). I tried the fix of "delete this one line" and switch over to smtp (which is an OK solution for me - using smtp, that is - small board membership) but that didn't work either.
I'm sorry, but at one point or another I've tried each and every fix - no dice. (Yes, I go back to the original file each time a fix fails - I do know that much.)
I know there are other boards working, I've also approached one user I know for assistance. The mail works here, so I know it works - but not for me - yes, brand new install - no mods what-so-ever.
So, as I mentioned once before, I can make the php settings from the ISP available to see if someone can tell if that would help - perhaps they have something set incorrectly on the ISP end?
Thanks for all the discussion.