Am 15.10.2017 um 18:34 schrieb Gerben Wierda: > My main restrictions in main.cf are (on macOS Server) > > smtpd_client_restrictions = > permit_mynetworks, > permit_sasl_authenticated, > check_client_access > regexp:/Library/Server/Mail/Config/postfix/rna_rbl_whitelist_clients, > reject_rbl_client zen.spamhaus.org <http://zen.spamhaus.org>, > permit > smtpd_delay_reject = yes > smtpd_enforce_tls = no > smtpd_helo_required = yes > smtpd_helo_restrictions = > permit_mynetworks, > reject_non_fqdn_helo_hostname, > reject_invalid_helo_hostname, > permit > smtpd_recipient_restrictions = permit_sasl_authenticated > reject_unauth_pipelining reject_non_fqdn_recipient permit_mynetworks > reject_unauth_destination reject_unlisted_recipient check_client_access > regexp:/Library/Server/Mail/Config/postfix/rna_policy_whitelist_clients > check_sender_access > regexp:/Library/Server/Mail/Config/postfix/rna_policy_whitelist_senders > check_policy_service unix:private/policy permit > > Rbl and greylisting helps to filter out most spam attempts. I have to > turn of greylisting for a few hours today, and a message came through > that had both From: and To: set to my email address. This was accepted > because I am the delivery agent for that domain. > > But an outside, non SASL-authenticated client that says it wants to > deliver mail From my domain is illegal. Apparently, that one still gets > through (though is generally blocked by greylisting). Anyway, is there a > way to block that without blocking legitimate mail? > > Gerben Wierda > Chess and the Art of Enterprise Architecture <http://enterprisechess.com/> > Mastering ArchiMate <http://masteringarchimate.com/> > Architecture for Real Enterprises > <https://www.infoworld.com/blog/architecture-for-real-enterprises/> at > InfoWorld > On Slippery Ice <https://eapj.org/on-slippery-ice/> at EAPJ >
are you informed about dkim,spf,dmarc ? Do you relay for third party ? Best Regards MfG Robert Schetterer -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64 Schleißheimer Straße 26/MG, 80333 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein
