I’ve tested it with Spamassassin 4.0.0 and this is the result:
You should check that your mail domain is configured to reject spam:
Also check the SPAM_REJECT_SCORE configured in Exim (by default it is 100 but I changed it to 80):
❯ grep 'SPAM.*SCORE' /etc/exim4/exim4.conf.template
SPAM_SCORE = 50
SPAM_REJECT_SCORE = 80
I’ve also modified some scores in conf file /etc/mail/spamassassin/sh_scores.cf:
❯ diff -u /root/apps/spamassassin-dqs/4.0.0+/sh_scores.cf /etc/mail/spamassassin/sh_scores.cf
--- /root/apps/spamassassin-dqs/4.0.0+/sh_scores.cf 2024-02-25 23:33:52.190396816 +0100
+++ /etc/mail/spamassassin/sh_scores.cf 2024-02-26 00:04:21.761163078 +0100
@@ -6,7 +6,7 @@
score SH_BODYURI_REVERSE_CSS 3
score SH_BODYURI_REVERSE_DROP 8
score SH_BODYURI_REVERSE_XBL 2
- score RCVD_IN_ZEN_LASTEXTERNAL 8
+ score RCVD_IN_ZEN_LASTEXTERNAL 10
score RCVD_IN_XBL 1
score RCVD_IN_PBL 0.001
score RCVD_IN_SBL 6
@@ -32,20 +32,20 @@
score SH_DBL_BODY 8
score SH_DBL_HEADERS 8
score SH_DBL_HEADERS_ABUSED 0.001
- score SH_ZRD_HEADERS_VERY_FRESH 8
- score SH_ZRD_HEADERS_FRESH 6
- score SH_REVERSE_ZRD_VERY_FRESH 8
- score SH_REVERSE_ZRD_FRESH 6
+ score SH_ZRD_HEADERS_VERY_FRESH 10
+ score SH_ZRD_HEADERS_FRESH 8
+ score SH_REVERSE_ZRD_VERY_FRESH 10
+ score SH_REVERSE_ZRD_FRESH 8
score SH_REVERSE_DBL 8
score SH_REVERSE_DBL_ABUSED 0.001
- score SH_HELO_ZRD_VERY_FRESH 8
- score SH_HELO_ZRD_FRESH 6
- score SH_HELO_DBL 8
+ score SH_HELO_ZRD_VERY_FRESH 10
+ score SH_HELO_ZRD_FRESH 8
+ score SH_HELO_DBL 10
score SH_HELO_DBL_ABUSED 0.001
score SH_AUTHBL_AND_DBL_ABUSED 6
- score SH_ZRD_BODY_FRESH 6
- score SH_ZRD_BODY_VERY_FRESH 8
+ score SH_ZRD_BODY_FRESH 8
+ score SH_ZRD_BODY_VERY_FRESH 10
# DQS wont block queries for open dns usage
score URIBL_DBL_BLOCKED_OPENDNS 0
So, with above conf all smtp tests are rejected.
If you modify Exim or Spamassassin conf, remember to restart the services:
systemctl restart exim4
systemctl restart spamd