Package: postfix Version: 2.2.4-1.0.1 Severity: normal When sending mail from a private host (with a host name that doesn't resolve via public DNS in the From and probably MAIL FROM) via a relay host to my Debian system, the message is rejected with this log message:
NOQUEUE: reject: RCPT from <relay host name>[<relay address>]: 450 <<user>@<private host name>>: Sender address rejected: Domain not found; from=<<user>@<private host name>> to=<<user>@<Debian host>> proto=SMTP helo=<<relay domain name>> The important part is "450 ...: Sender address rejected: Domain not found" This suggests the mail is being rejected due to *smtpd_sender_restrictions* being in effect, yet the Postfix documentation states http://www.postfix.org/uce.html#smtpd_sender_restrictions Default: smtpd_sender_restrictions = By default, the Postfix SMTP server accepts any sender address. My configuration file, main.cf, lacks this directive, and postconf shows that it remains at the default value of empty. Explicitly adding an empty directive also rejects these messages. -- System Information: Debian Release: testing/unstable APT prefers testing APT policy: (500, 'testing'), (50, 'unstable') Architecture: i386 (i686) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.11-eagle Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8) Versions of packages postfix depends on: ii adduser 3.79 Add and remove users and groups ii debconf [debconf-2.0] 1.4.59 Debian configuration management sy ii dpkg 1.13.11.0.1 package maintenance system for Deb ii libc6 2.3.5-8 GNU C Library: Shared libraries an ii libdb4.2 4.2.52-18 Berkeley v4.2 Database Libraries [ ii libsasl2 2.1.19-1.7 Authentication abstraction library ii libssl0.9.8 0.9.8a-3 SSL shared libraries ii netbase 4.23 Basic TCP/IP networking system Versions of packages postfix recommends: ii emacs21-nox [mail-reader] 21.4a-1 The GNU Emacs editor (without X su ii mailutils [mail-reader] 1:0.6.90-3 GNU mailutils utilities for handli ii mutt [mail-reader] 1.5.11-4 Text-based mailreader supporting M pn resolvconf <none> (no description available) -- debconf information excluded -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]