Nikki Locke wrote:
> Is there an easy way of getting qmail's SMTP server to reject invalid
>  
> addresses at the RCPT TO stage?
> 
> 
> It would save a lot of disk space and processing power when I'm hit with 
> thousands of spams a day.

This is already setup by default with my toaster patch.  It includes the
chkuser patch, which handles this.  Note that it does not bounce mail if:

1) user account or alias/mailing list exists
2) the smtp client has RELAYCLIENT set
3) the domain does not contain "bounce-no-mailbox" in .qmail-default for
the domain.

Regards,

Bill

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