lower base when no mx found at all in independents

Author: davidhuser

src/mail_sovereignty/classifier.py

@@ -84,6 +84,18 @@ def _rule_confidence(
 
     Rule chain (ordered by specificity, first match wins):
 
+  ```
+- MX only 80% (Most likely unfinished config)
+- MX + SPF 90% (Managed setup)
+- AD + SPF 90% (Security GW upfront)
+- MX + SPF + AD 95% (Cloud Setup)
+
+AD Cases sind natürlich nur MS-relevant. Mit den restlichen Indikatoren könntest du bspw. dann die restlichen 5-10% auffüllen.  Die %-te kann man natürlich auch anders aufteilen.
+```
+
+// messen wie viel Rule gebraucht wird, evtl R5-R8 nicht unbeding relevant
+
+
     ====  ==========================  ====
     Rule  Condition                   Base
     ====  ==========================  ====
@@ -93,7 +105,7 @@ def _rule_confidence(
     R4    MX ∧ TENANT                0.85
     R5    SPF ∧ TENANT               0.80
     R6    SPF ∧ GW                   0.70
-    R7    MX                         0.60
+    R7    MX                         0.60  // eher auf 80%
     R8    SPF                        0.50
     R9    else                       0.40
     ====  ==========================  ====
@@ -143,7 +155,7 @@ def _independent_confidence(
 
     * MX + SPF present → 0.90
     * MX only          → 0.60
-    * Any evidence     → 0.50
+    * No MX, secondary evidence only → 0.20
     * Nothing          → 0.0
 
     After the base is selected, each distinct signal kind in *evidence*
@@ -158,7 +170,7 @@ def _independent_confidence(
     elif has_mx:
         base = 0.60
     elif evidence:
-        base = 0.50
+        base = 0.20
     else:
         return 0.0
 

tests/test_classifier.py

@@ -226,8 +226,8 @@ def test_tenant_alone_no_winner(self):
         ]
         result = _aggregate(evidence)
         assert result.provider == Provider.INDEPENDENT
-        # Evidence present but no MX → 0.50 base + 1 extra kind × 0.02
-        assert result.confidence == pytest.approx(0.52)
+        # No MX, secondary evidence only → 0.20 base + 1 extra kind × 0.02
+        assert result.confidence == pytest.approx(0.22)
 
     def test_tenant_with_primary(self):
         """Tenant evidence with MX primary → MX+TENANT rule."""
@@ -281,8 +281,8 @@ def test_txt_verification_alone_no_winner(self):
         ]
         result = _aggregate(evidence)
         assert result.provider == Provider.INDEPENDENT
-        # Evidence present but no MX → 0.50 base + 1 extra kind × 0.02
-        assert result.confidence == pytest.approx(0.52)
+        # No MX, secondary evidence only → 0.20 base + 1 extra kind × 0.02
+        assert result.confidence == pytest.approx(0.22)
 
     def test_txt_verification_with_primary(self):
         """TXT_VERIFICATION with primary signals boosts confidence."""
@@ -302,8 +302,8 @@ def test_asn_alone_no_winner(self):
         ]
         result = _aggregate(evidence)
         assert result.provider == Provider.INDEPENDENT
-        # Evidence present but no MX → 0.50 base + 1 extra kind × 0.02
-        assert result.confidence == pytest.approx(0.52)
+        # No MX, secondary evidence only → 0.20 base + 1 extra kind × 0.02
+        assert result.confidence == pytest.approx(0.22)
 
     def test_asn_with_primary(self):
         """ASN evidence with primary signals boosts confidence."""
@@ -331,8 +331,8 @@ def test_swiss_isp_spf_ip_alone_no_winner(self):
         ]
         result = _aggregate(evidence)
         assert result.provider == Provider.INDEPENDENT
-        # Evidence present but no MX → 0.50 base + 1 extra kind × 0.02
-        assert result.confidence == pytest.approx(0.52)
+        # No MX, secondary evidence only → 0.20 base + 1 extra kind × 0.02
+        assert result.confidence == pytest.approx(0.22)
 
     def test_spf_ip_alone_no_winner(self):
         """SPF_IP(Google) alone → INDEPENDENT (regression test for zuerich.ch)."""
@@ -341,8 +341,8 @@ def test_spf_ip_alone_no_winner(self):
         ]
         result = _aggregate(evidence)
         assert result.provider == Provider.INDEPENDENT
-        # Evidence present but no MX → 0.50 base + 1 extra kind × 0.02
-        assert result.confidence == pytest.approx(0.52)
+        # No MX, secondary evidence only → 0.20 base + 1 extra kind × 0.02
+        assert result.confidence == pytest.approx(0.22)
 
     def test_spf_ip_with_primary(self):
         """MX(Google) + SPF_IP(Google) → Google with boosted confidence."""