I receive the error below every twenty minutes:

Delivered-To: postmaster@socotherm-nigeria.com
Return-Path: <smmsp@socotherm-nigeria.com>
Received: from localhost (localhost [127.0.0.1])
(uid 112)
by mailserver with local; Tue, 20 Oct 2009 09:00:02 +0100
id 00D6C03A.4ADD6E02.00007F0C
From: CronDaemon <root@socotherm-nigeria.com>
To: root@socotherm-nigeria.com
Subject: Cron <smmsp@mailserver> test -x /etc/init.d/sendmail && /usr/share/sendmail/sendmail cron-msp
Content-Type: text/plain; charset=UTF-8
X-Cron-Env: <MAILTO=root>
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/var/lib/sendmail>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=smmsp>
Message-ID: <courier.4ADD6E02.00007F0C@socotherm-nigeria.com>
Date: Tue, 20 Oct 2009 09:00:02 +0100

/usr/share/sendmail/sendmail: 1248: /usr/sbin/sendmail-msp: not found

You haven't given us any information about the system you're running. Is your box socotherm-nigeria.com or are you just trying to remove that email from the queue? The cron job isn't finishing because it can't find /usr/sbin/sendmail-msp so maybe your sendmail isn't properly installed.

I am running UBUNTU Linux 9.04. Yes, my box is socotherm-nigeria.com. I checked the Synaptic Package editor, and Sendmail is installed. I have uninstalled and installed again and it is still the same thing.