Forum Emails to users will not send out
 

Hi I am having a problem where I cannot send emails to my users. Anyone know what I need to do to fix this? Here is the message I receive after I hit the send email button:

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Apache Server at www.regiusrealtors.com Port 80