Preventing Spam with Postfix

[CubAfull]

Searching for good solution to prevent most of the spam i found this...

# vi /etc/postfix/main.cf

Set/modify configuration as follows

disable_vrfy_command = yes
smtpd_delay_reject = yes
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks,
reject_non_fqdn_hostname,
reject_invalid_hostname,
permit
smtpd_recipient_restrictions =
permit_sasl_authenticated,
reject_invalid_hostname,
reject_non_fqdn_hostname,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
reject_unknown_sender_domain,
reject_unknown_recipient_domain,
permit_mynetworks,
reject_rbl_client list.dsbl.org,
reject_rbl_client sbl.spamhaus.org,
reject_rbl_client cbl.abuseat.org,
reject_rbl_client dul.dnsbl.sorbs.net,
permit
smtpd_error_sleep_time = 1s
smtpd_soft_error_limit = 10
smtpd_hard_error_limit = 20

It would be correct to add this setting to Postfix in Debian Etch (The Perfect Setup) + ISPConfig?

[till]

The above should work fine with ISPConfig too.

[bolero]

Some of this looks redundant and also belonging in another category to me. Compare with the Postfix documentation before use.