From:	CRDGW2::CRDGW2::MRGATE::"SMTP::CRVAX.SRI.COM::RELAY-INFO-VAX" 30-AUG-1989 00:24
To:	MRGATE::"ARISIA::EVERHART"
Subj:	Blocking Individual Users Out of VaxMail

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Date: 30 Aug 89 03:11:24 GMT
From: bsu-cs!cfchiesa@iuvax.cs.indiana.edu  (Christopher Chiesa)
Organization: CS Dept, Ball St U, Muncie, IN, USA
Subject: Blocking Individual Users Out of VaxMail
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As promised, and sooner than expected, here are the details of "blocking indi-
vidual users out of your mail," or in other words, how NOT to receive mail from
selected usernames.  (I thought I was going to have to search my files for this
information, but the wizards at BSU Computing Services have come up with 
(written?) an "expert system" that had the info in my hands in about ten sec-
onds...  Thanks also to Paul Frommeyer for his attempt to recreate it from 
memory.) 

Straight off the system, here's the procedure:

.
. >> Setting the lock on some users so you will not receive any mail
. >> from them involves several steps.
.
.    [1]. Create a mail directory if you don't have one.
.         MAIL> SET MAIL [.MAIL]
.         MAIL> EXIT
.    [2]. Set the protection on the directory so that only the system
.         and the owner can read, execute and write:
.         $ SET PROT=(S:RWE,O:RWE,G,W) MAIL.DIR
.    [3]. Get into MAIL.DIR:
.         $ SET DEFAULT [.MAIL]
.    [4]. Set the protection on mail FILE so anyone (including system)
.         may access the mail file:
.         $ SET PROT=(S,0:RWE,G:RW,W:RW) MAIL.MAI
.    [5]. Place an ACL (Access Control List) on the file so specified
.         users may not have any access to the .MAI file:
.         $ SET FILE/ACL=(ID=username,ACCESS=NONE) MAIL.MAI
. >> The person with that username will not be able to send you any
. >> mail from now on.
.
.
. >> If you wish to remove the lock on the person you have blocked be-
. >> fore then type the following:
.
.          $ SET FILE MAIL.MAI /DELETE/ACL=(ID=username)
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