no prob.
Code:
$sendmail = '/path/to/sendmail';
open (MAIL, "| $sendmail -t") || die "sendmail failed $!";
print MAIL "To: whoever\@wherever.com\n";
print MAIL "Subject: mud's broke!\n\n";
print MAIL "Mud's broke. Fix it!\n";
close MAIL;
Fill in the appropriate path to sendmail (do "which sendmail" on the command line to find that out), your email address (remembering to escape the "@"), and you should be good to go. Every time this is executed, it'll send you an email complaining about a dead mud.
What this won't do is monitor the mud. That's a different script entirely.