Thanks for your fast answer, and sorry for my late reply Ok after reading and configure me mailserver with postscreen i have the following situation when i send any mail.
[Main.cf] postscreen_blacklist_action = drop postscreen_access_list = permit_mynetworks, hash:/etc/postfix/access [Master.cf] ## smtp inet n - n - - smtpd -o content_filter=spamassassin smtp inet n - - - 1 postscreen -o content_filter=spamassassin smtpd pass - - - - - smtpd dnsblog unix - - - - 0 dnsblog tlsproxy unix - - - - 0 tlsproxy submission inet n - - - - smtpd -o content_filter=spamassassin .... "450 4.3.2 Service currently unavailable" ?? [Mail.log] Mar 4 21:59:40 Dovecot/imap(mca@domain): Info: Disconnected: Logged out in=1443 out=219620 Mar 4 22:00:13 mail postfix/postscreen[1050]: CONNECT from [IP]:45143 to [IP]:25 Mar 4 22:00:13 mail postfix/dnsblog[1060]: addr [IP] listed by domain list.dnswl.org as 127.0.3.0 Mar 4 22:00:13 mail postfix/dnsblog[1076]: addr IP listed by domain spamtrap.trblspam.com as 185.53.179.6 Mar 4 22:00:13 mail postfix/dnsblog[1077]: addr IP listed by domain wl.mailspike.net as 127.0.0.20 Mar 4 22:00:19 mail postfix/tlsproxy[1061]: CONNECT from [IP]:45143 Mar 4 22:00:19 mail postfix/tlsproxy[1061]: Anonymous TLS connection established from [IP]:45143: TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits) Mar 4 22:00:19 mail postfix/postscreen[1050]: NOQUEUE: reject: RCPT from [40.92.69.70]:45143: 450 4.3.2 Service currently unavailable; from=<form email>, to:<email>, proto=ESMTP, helo=<EUR02-VE1-obe.outbound.protection.outlook.com> Mar 4 22:00:19 mail postfix/tlsproxy[1061]: DISCONNECT [IP]:45143 Mar 4 22:00:19 mail postfix/postscreen[1050]: HANGUP after 0.16 from [IP]:45143 in tests after SMTP handshake Mar 4 22:00:19 mail postfix/postscreen[1050]: PASS NEW [IP]:45143 Mar 4 22:00:19 mail postfix/postscreen[1050]: DISCONNECT [IP]:45143 Equal from where i send the email to my domain this error will be appair. -- > On Mar 1, 2018, at 12:42 AM, Maurizio Caloro <m@c> wrote: > > I have have create any acceslist to deny, but if check me situation > this will conntecd successfuly to me maschine Postfix access lists control email delivery not connection establishment. To control connection establishment use a firewall. You can also prevent unwanted clients from reaching the smtpd(8) service via postscreen(8) blacklists. -- Viktor.