In article <3561B72E.A6A3D39F@vms.cis.pitt.edu>,
Bob Schor  <bschor@vms.cis.pitt.edu> wrote:
:Is it necessary to send exactly the same message out four times with
:different subject lines?

Right! The even more relevant question to the original poster is why not cancel the three superfluous?

-From: !!! ftp://garbo.uwasa.fi/pc/ts/tsfaqn46.zip Frequently Asked Questions
-Subject: Canceling postings

23. *****    Q: I am having problems with canceling my posting. What to do?

 A: How one cancels one's own posting is naturally dependent on the newsreader program that one uses. In rn you can cancel your posting by pressing C (that is shift-c) when reading your own posting. In other newsreaders check their help function for the cancel command. For example in tin the cancel command is D.
   Confusingly, it may happen that you are unable to cancel your own posting but get a "You can't cancel someone else's posting" message instead. That implies that the newssystem at your side has been configured badly. The sender and your own id do not match. It is not your fault. There is nothing you can do about that yourself. It is up to your local newsmanager to set the system right. Contact him/her in case of this problem.

16. *****
 Q: I just posted to a wrong newsgroup. Should I explain it in a follow-up posting?

 A: Not necessarily. Much better to cancel your posting. At least if you are using rn for reading news, you can cancel your posting as follows. Go to your posting, start reading it, then apply the
command C on it. In the tin newsreader the cancel command is D. If you don't want to lose what you wrote, first save your message to a file with the s option if you are using rn. See the newsreader's help (h in rn) for more details on the commands. This is much preferable to following up with an explanation.

It is a good thing that you care where you post. It is frustrating to see postings that have nothing to do with the contents of the newsgroup. Some users are way too careless in this respect. (I must plead occasionally guilty myself). Posting to a wrong newsgroup is not even rational, because the chances of getting a useful response are diminished. Nevertheless, a follow-up explanatory posting may just double the mistake and draw unnecessary attention (if you cannot cancel what you posted).

   A specific warning. If you have made the mistake of posting an inappropriate ad to a number of newsgroups (i.e. a spam) and got burned for it, please do not compound the offense by posting
multiple apologies. Even if it is nice to be repentant, it just compounds the annoyance. The best apology is not to spam again.

Spam foiling in effect.  My email filter autoresponder will return a
required email password to users not yet in the privileges database.