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Article View: comp.mail.misc
Article #1306

Re: how do I mail to a lot of unix users?

#1306
From: Lyndon Nerenberg
Date: Mon, 04 Jun 1990 17:41
28 lines
1919 bytes
In article <KARL.90May31113729@giza.cis.ohio-state.edu> karl_kleinpaste@cis.ohio-state.edu writes:

>	mail `awk -F: '{ print $1 }' /etc/passwd`	# finds everybody

Yes, this mails to all the users (in the password file). It also mails
to all the uucp logins, the daemons, the anonymous ftp account, ...
If you are running sendmail on a slow machine (say, a 785) and you
have a reasonable number of users logged in (say, 40) you will be able
to see how a VAX does not fall over when its load average hits 75+.
It just gets real sloooow. It gets sooo slooooow that the system
administrator will wait about 10 minutes between the time he enters
the password for the su command, and the time he gets a shell prompt
to start blowing away all those sendmail processes ...

Before doing this, maybe you should ask your local postmaster about
how to do this efficiently? Perhaps a local news group? Or maybe
something in the Message of the Day? Or maybe your message is that
all fire important after all?

[ FYI - Of the last person that tried the above trick here, all
        that was found was a smoldering lump of some charred organic
	substance. ]

-- 
      Lyndon Nerenberg  VE6BBM / Computing Services / Athabasca University
          {alberta,cbmvax,mips}!atha!lyndon || lyndon@cs.athabascau.ca
         Sendmail has been described as the largest program yet created
                 that does absolutely nothing. -- Mr. Protocol
Technical Details
Message-ID: <1925@aurora.cs.athabascau.ca>
Path: arc1-ca.pugleaf.net!utzoo!utgpu!watserv1!watmath!att!occrsh!uokmax!munnari.oz.au!uunet!van-bc!ubc-cs!alberta!aunro!atha!lyndon
References: <900531083220.30e0b91a@Csa2.LBL.Gov> <KARL.90May31113729@giza.cis.ohio-state.edu>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!watserv1!watmath!att!occrsh!uokmax!munnari.oz.au!uunet!van-bc!ubc-cs!alberta!aunro!atha!lyndon
From: lyndon@cs.AthabascaU.CA (Lyndon Nerenberg)
Newsgroups: comp.mail.misc
Subject: Re: how do I mail to a lot of unix users?
Message-ID: <1925@aurora.cs.athabascau.ca>
Date: 4 Jun 90 17:41:45 GMT
References: <900531083220.30e0b91a@Csa2.LBL.Gov> <KARL.90May31113729@giza.cis.ohio-state.edu>
Organization: Athabasca University
Lines: 28