我有一个相当标准的 Postfix 配置来将邮件转发到多个域（设置包括 postsrsd 和 spamassassin/spamass-milter，它们工作正常）：
myhostname = mail.mydomain.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = $myhostname, localhost.localdomain, localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
virtual_alias_domains = mydomain.com, otherdomain.com, thirddomain.com
virtual_alias_maps = hash:/etc/postfix/virtual
但是，Postfix 不是只为 virtual_alias_maps 中定义的地址接收（和转发）邮件，而是尝试向各种邮件服务器发送欺诈性消息，如下所示：
Jan 29 15:52:41 localhost postfix/qmgr[354872]: D07D97F95E: from=<>, size=12267, nrcpt=1 (queue active)
Jan 29 15:52:41 localhost postfix/qmgr[354872]: 9C1C77F952: from=<>, size=11583, nrcpt=1 (queue active)
Jan 29 15:52:41 localhost postfix/smtp[362942]: connect to mail.visceration.co[2606:4700:3032::ac43:8c58]:25: No route to host
Jan 29 15:52:41 localhost postfix/smtp[362942]: connect to mail.visceration.co[2606:4700:3033::6815:369f]:25: No route to host
Jan 29 15:52:41 localhost postfix/smtp[362943]: connect to mail.smartsnakepro.us[2606:4700:3031::6815:efe]:25: No route to host
Jan 29 15:52:42 localhost postfix/smtp[362944]: 9C1C77F952: to=<[email protected]>, relay=mail.gethoys.me[137.184.49.234]:25, delay=139007, delays=139006/0.03/0.76/0.1, dsn=4.7.1, status=deferred (host mail.gethoys.me[137.184.49.234] said: 454 4.7.1 <[email protected]>: Relay access denied (in reply to RCPT TO command))
Jan 29 15:53:11 localhost postfix/smtp[362942]: connect to mail.visceration.co[172.67.140.88]:25: Connection timed out
Jan 29 15:53:11 localhost postfix/smtp[362943]: connect to mail.smartsnakepro.us[104.21.14.254]:25: Connection timed out
Jan 29 15:53:11 localhost postfix/smtp[362943]: connect to mail.smartsnakepro.us[2606:4700:3033::ac43:a0d9]:25: No route to host
Jan 29 15:53:41 localhost postfix/smtp[362942]: connect to mail.visceration.co[104.21.54.159]:25: Connection timed out
如何防止我的邮件服务器对这些连接做出反应？为什么不涉及 smtpd（因为它在合法的邮件转发中）？
谢谢，扬
我检查了 postqueue 并意识到这些日志条目是由退回到不存在或伪造的邮件服务器的消息创建的。对不起！