Mail function broken

Hi, my wordpress mail function broke suddenly. no email is leaving my site at all, even the contact forms don’t work. PHP and SMTP mailers are working outside of wordpress, so I’ve verified that my sharedhosting domain is doing it’s end of the job. Nothing works from wordpress though, I’ve even tried the WP-SMTP-Mail plugin, to no avail (test emails send though, same with FS Contact Form, but no luck with registration, confirmation, contact form plugins, etc).

I suspect this might be related to a bum plugin install, which I had to remove manually by FTP, but I’m not sure.

Does anyone know a way I can test the mail function, or output the errors so I can see what step it’s failing at? I’m kinda of new to php/wordpress, and I have no idea how to diagnose the problem. I’m running wordpress 3.2.1. My domain is at noisechannel.org.

If anyone knows a quickfix, I’d gladly take that too.