几天前，我在“ From:和“ Return-Path标题中都收到了“< ""@smtp.enta.net Postfix接受了这封电子邮件并将其传送给了dovecot。
是否有可能configurationPostfix要求有效的发件人地址（或至less有一个有效的发件人），或者我可以在@符号之前阻止没有用户名的电子邮件？
该消息的标题：
Return-Path: <""@smtp.enta.net> Delivered-To: <[email protected]> Received: from mail.example.com by mail.example.com (Dovecot) with LMTP id Q7XVJrXy3lYYdQAAfPZOvw for <[email protected]>; Tue, 08 Mar 2016 16:41:41 +0100 Received: by mail.example.com (Postfix, from userid 109) id 9BA2320826; Tue, 8 Mar 2016 16:41:41 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail.example.com X-Spam-Level: * X-Spam-Status: No, score=1.7 required=5.0 tests=BAYES_00,FROM_NO_USER, HDRS_MISSP,HELO_MISC_IP,RDNS_NONE autolearn=no autolearn_force=no version=3.4.0 Received-SPF: None (no SPF record) identity=mailfrom; client-ip=171.233.198.106; helo=[171.233.198.106]; [email protected]; [email protected] Received: from [171.233.198.106] (unknown [171.233.198.106]) by mail.example.com (Postfix) with ESMTP id 0CB112081D for <[email protected]>; Tue, 8 Mar 2016 16:41:39 +0100 (CET) From: ""@smtp.enta.net To: [email protected] Subject: New voice mail message from 02083469819 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="3MwIy2ne0vdjdPXF" Message-Id: <[email protected]> Date: Tue, 08 Mar 2016 22:41:29 +0700 X-Evolution-Source: [email protected]
你可以使用PCRE表，并把它放在smtpd限制
# /etc/postfix/empty.pcre /^""@/ REJECT
并在main.cf中
smtpd_recipient_restrictions = check_recipient_access pcre:/etc/postfix/empty.pcre, check_sender_access pcre:/etc/postfix/empty.pcre ... other restrictions ...