John Fawcett:
> Jun 15 00:21:59 server01 postfix/postscreen[2134]: NOQUEUE: reject: RCPT
> from [114.24.2.181]:4289: 550 5.7.1 Service unavailable; client
> [114.24.2.181] blocked using zen.spamhaus.org;
> from=<z200...@yahoo.com.tw>, to=<gk49f...@yahoo.com.tw>, proto=SMTP,
> helo=<80.237.194.71>
postscreen does not and will not look up (or verify) the client
hostname. Querying a DNSBL/DNSWL server of your choice is expected
to be fast, but all bets are off with random DNS servers. That would
make postscreen a pertformance bottleneck.
Wietse
