Hi Sven!

Sven Putze wrote:
> how to block connections from dial-in accounts?

There are several lines in my config that avoids me from many UBEs, see
below.

You may like to check wether the RBLs are suitable for your needs, many RBLs
are very restrictive.

Two links:
http://www.bez.tedesca.net/homeoff/a...tml#Spamfilter (German)
http://www.stahl.bau.tu-bs.de/~hildeb/postfix/

Greetings, Michael.


#delivery controls - UCE blocking
unknown_local_recipient_reject_code = 550
unknown_hostname_reject_code = 550
unknown_address_reject_code = 550
unverified_sender_reject_code = 550
smtpd_helo_required = yes
smtpd_helo_restrictions =
permit_mynetworks,
reject_invalid_hostname,
reject_non_fqdn_hostname,
permit
smtpd_sender_restrictions =
permit_mynetworks,
reject_unknown_sender_domain,
reject_rhsbl_sender rhsbl.sorbs.net,
permit
smtpd_recipient_restrictions =
permit_mynetworks,
permit_sasl_authenticated,
reject_unknown_recipient_domain,
reject_unauth_destination,
reject_invalid_hostname,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
permit
smtpd_client_restrictions =
reject_invalid_hostname,
reject_rbl_client xbl.spamhaus.org,
reject_rbl_client sbl.spamhaus.org,
reject_rbl_client relays.ordb.org,
reject_rbl_client dnsbl.njabl.org,
reject_rbl_client dul.dnsbl.sorbs.net,
permit