Re: [vps-mail] !nouser problems

[Godwin Stewart <gstewart@xxxxxxxxxxx>]

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On Wed, 16 Mar 2005 14:56:17 +0100, "Andy McKell, FOCUS Internet"
<mac@xxxxxxxx> wrote:

> Is my recipe or the server at fault?
> 
> >:0
> >* This is spam
> >!nouser

Your recipe is at fault. If there is no local account called "nouser" then
you are trying to send mail to a non-existent account, which *will* result
in a postmaster notify.

If you want certain pieces of mail not to be received then you need to
handle this in your access, sendmail.cf (DNSBLs) and virtusertable access
control lists and REJECT the inbound mail at the SMTP level rather than
accept it only to realise later that you shouldn't have. This kind of
triage should really be done *before* the mail gets anywhere near procmail.

Accepting and then bouncing (bounce!=reject) puts you at risk of getting
yourself listed in widely used public DNSBLs (and countless private, local
DNSBLs) due to backscatter sent to spam traps. For example:

http://www.spamcop.net/fom-serve/cache/329.html#bounces

Alternatively, you can route the unwanted mail to the bitbucket:

:0
* This is spam
/dev/null

- -- 
G. Stewart - gstewart@xxxxxxxxxxx

Reporter (to Mahatma Gandhi):
  "Mr. Gandhi, what do you think of Western civilisation?"
Gandhi:
  "I think it would be a good idea."
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