Email not working

[computergenius433]

In the past, I used the CGI Email script to direct inquiries to one of my webmail addresses, inquiries@slhskeyclub.x10hosting.com, but it has recently stopped working. The mail does not reach the email address, and, after a few days, I get a failed delivery message in my general inbox. This mail system used to work flawlessly. I did not change my webpage or my CGI mail templates in any way. The error listed is a "Mail delivery failed: returning message to sender" error.
The text of the error message is as follows:
This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

eventsignups@slhskeyclub.x10hosting.com

------ This is a copy of the message, including all the headers. ------

Return-path: <compu4@stoli.x10hosting.com>
Received: from compu4 by stoli.x10hosting.com with local (Exim 4.69)
(envelope-from <compu4@stoli.x10hosting.com>)
id 1Kfn1R-0000kk-E9
for eventsignups@slhskeyclub.x10hosting.com; Tue, 16 Sep 2008 22:43:43 -0400
Received: from 70.15.43.39 by slhskeyclub.x10hosting.com with HTTP;
Tue, 16 Sep 2008 22:43:42 EDT
X-Mailer: cgiemail 1.6
(form="http://slhskeyclub.x10hosting.com/signup.php")
(action="/cgi-bin/cgiemail/activitysubmit.txt")
To: eventsignups@slhskeyclub.x10hosting.com
Subject: Activity Application
Message-Id: <E1Kfn1R-0000kk-E9@stoli.x10hosting.com>
From: compu4@stoli.x10hosting.com
Date: Tue, 16 Sep 2008 22:43:42 -0400

I appreciate all your help!

 

[Christopher]

It may be because the mail server keeps crashing.
I'm watching it and trying to start it back up when it goes down.

 

[computergenius433]

I tried using a form on my site to send email, and it still does not work. However, I noticed, after I sent the form data, that Exim was offline. Is Exim the mail component of the server?

 

[Christopher]

Exim is the mail component.