main.cf
inet_interfaces = all mydestination = $myhostname, localhost.$mydomain, und alle meine Domainnamen in kommaseparierter Liste #spam-schutz ? 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 = reject_invalid_hostname, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unknown_sender_domain, reject_unknown_recipient_domain, permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, reject_unknown_reverse_client_hostname, 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 #reject_non_fqdn_hostname, smtpd_error_sleep_time = 1s smtpd_soft_error_limit = 10 smtpd_hard_error_limit = 20 #ggf. vorhandene Einstellungen auskommentieren