[MTA] Vornamen-Attacke

[valo]

das

smtpd_helo_required = yes
strict_rfc821_envelopes = yes

in verbindung mit

reject_non_fqdn_sender,
reject_non_fqdn_recipient,

bei den smtpd_recipient_restrictions blockt schon sehr viele von diesen automatischen spamschleudern...

in meiner main.cf schaut der smtpd_recipient_restrictions part so aus:

smtpd_recipient_restrictions =
check_helo_access hash:/etc/postfix/helo_checks,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
# reject_unknown_sender_domain,
reject_unknown_recipient_domain,
permit_mynetworks,
reject_unauth_destination,
# check_recipient_access hash:/etc/postfix/recipient_checks,
# check_helo_access hash:/etc/postfix/helo_checks,
# check_sender_access hash:/etc/postfix/sender_checks,
# check_client_access hash:/etc/postfix/client_checks,
reject_unauth_pipelining,
reject_invalid_hostname,
reject_non_fqdn_hostname,
# reject_rbl_client relays.ordb.org,
# reject_rbl_client proxy.relays.osirusoft.com,
# reject_rbl_client socks.relays.osirusoft.com
# check_sender_access hash:/etc/postfix/rhsbl_sender_domain_exceptions,
# reject_rhsbl_sender dsn.rfc-ignorant.org
# check_sender_access hash:/etc/postfix/frequently_forged_senders
permit