[plug] Is this a spam attack?

[James Devenish]

On the topic of e-mail noise prevention:

In message <3EC0B946.9010600 at wn.com.au>
on Tue, May 13, 2003 at 05:22:14PM +0800, Luke Dudney wrote:
> Postfix does the job quite well on it's own, when configured for:
> - sender address verification (probe the sender domain's MX for the 
> existence of the sender address)
> - reject_rbl_client with your choice of RBLs such as bl.spamcop.net and 
> proxies.relays.monkeys.com
> - reject_unknown_sender_domain
> - reject_non_fqdn_hostname

Good advice, but be aware that:
 - all of these can potentially (or always) prevent certain legitimate
   mail, so consider them individually in the context of your own
   operations.
 - some or all of these require significant cooperation of third parties
   and adherence to conventions in daemon configuration for proper full
   efficacy.