DNN site up and running for quite a while now, when all of a sudden whenever DNN tries to send out an email I get the following error:

Unhandled Error

Error Details

I first noticed then in a module that tries to send out a notice email, but then when I was checking in the Host SMTP settings it was having the same problem. In the Host settings section when I try to send a test email I get the same error as above.

Any information would be of great assistance.

Thanks!

Its a client's website. Apparently they were modifying some self created forms using a module called form Master. While those are messing up when they send an email out, I am not sure why it would affect the entire sites email functionality.