Debian，Postfix，Spamassassin。当 postfix 收到垃圾邮件时，postfix 发送答案：550 5.7.1 Blocked by SpamAssassin。
我无法禁用它。如何不拒绝，而是默默地丢弃垃圾邮件？我不想让垃圾邮件发送者知道我的邮件服务器收到了恶意邮件。
/etc/postfix/master.cf：
...
spamassassin unix - n n - - pipe
user=debian-spamd argv=/usr/bin/spamc -f -e
/usr/sbin/sendmail -oi -f ${sender} ${recipient}
/etc/postfix/main.cf
...
milter_default_action = accept
milter_protocol = 6
smtpd_milters = inet:localhost:8891,local:spamass/spamass.sock
non_smtpd_milters = $smtpd_milters
...
/etc/spamassassin/local.cf：
rewrite_header Subject *****SPAM*****
report_safe 0
required_score 5.0
use_bayes 1
bayes_auto_learn 1
skip_rbl_checks 0
use_razor2 0
use_pyzor 0
allow_user_rules 0
body LOCAL_DEMONSTRATION_RULE /root-test-12345/i
score LOCAL_DEMONSTRATION_RULE 6.0
describe LOCAL_DEMONSTRATION_RULE This is a simple test rule in body.
header LOCAL_DEMONSTRATION_SUBJECT Subject =~ /\btestheader\b/i
score LOCAL_DEMONSTRATION_SUBJECT 6.0
describe LOCAL_DEMONSTRATION_SUBJECT This is a simple test rule in header.
在我安装 spamass-milter 之前，Spamassassin 只会将电子邮件主题标记为垃圾邮件。
垃圾邮件检测有效，问题是如何禁用自动通知。