https://bz.apache.org/SpamAssassin/show_bug.cgi?id=7943 --- Comment #1 from Matija Nalis <mnalis-sabug@voyager.hr> ---
One observation: it seems that "totscore" is not always being changed while
"msgcount" is. Should it have been?
Because, if it were changed at the same rate, then that formula *would* keep
delta at zero, e.g.:
dbg: TxRep: mn EMAILIP _formula delta = (total()=0.000 + msgscore=-10.210) / (1
+ count()=0.000) - msgscore=-10.210 = 0.000
dbg: TxRep: mn EMAILIP _formula delta = (total()=-10.210 + msgscore=-10.210) /
(1 + count()=1.000) - msgscore=-10.210 = 0.000
dbg: TxRep: mn EMAILIP _formula delta = (total()=-20.420 + msgscore=-10.210) /
(1 + count()=2.000) - msgscore=-10.210 = 0.000
dbg: TxRep: mn EMAILIP _formula delta = (total()=-30.630 + msgscore=-10.210) /
(1 + count()=3.000) - msgscore=-10.210 = 0.000
dbg: TxRep: mn EMAILIP _formula delta = (total()=-40.840 + msgscore=-10.210) /
(1 + count()=4.000) - msgscore=-10.210 = 0.000
I've seen in code that calling add_score() is sometimes connected to
(non-default) "txrep_autolearn 1". Enabling autolearn does indeed make
"totscore" change, but in a wrong way too, and also "msgcount" gets increased
by 2 instead of by 1. The miscalculation leading from ham to spam is still
there, even with autolearn enabled though:
+----------+---------------+------+----------+----------+----------+---------------------+
| username | email | ip | msgcount | totscore | signedby | last_hit
|
+----------+---------------+------+----------+----------+----------+---------------------+
| amavis | hepi@hep.hr | none | 2 | -30.21 | spf | 2021-11-12
04:41:52 |
| amavis | hepi@hep.hr | none | 4 | -23.4033 | spf | 2021-11-12
04:43:22 |
| amavis | hepi@hep.hr | none | 6 | -22.042 | spf | 2021-11-12
04:43:58 |
| amavis | hepi@hep.hr | none | 8 | -21.4586 | spf | 2021-11-12
04:44:30 |
| amavis | hepi@hep.hr | none | 10 | -21.1344 | spf | 2021-11-12
04:44:59 |
dbg: TxRep: mn EMAILIP _formula delta = (total()=0.000 + msgscore=-10.210) / (1
+ count()=0.000) - msgscore=-10.210 = 0.000
dbg: TxRep: mn EMAILIP _formula delta = (total()=-30.210 + msgscore=-10.210) /
(1 + count()=2.000) - msgscore=-10.210 = -3.263
dbg: TxRep: mn EMAILIP _formula delta = (total()=-23.403 + msgscore=-10.210) /
(1 + count()=4.000) - msgscore=-10.210 = 3.487
dbg: TxRep: mn EMAILIP _formula delta = (total()=-22.042 + msgscore=-10.210) /
(1 + count()=6.000) - msgscore=-10.210 = 5.603
dbg: TxRep: mn EMAILIP _formula delta = (total()=-21.459 + msgscore=-10.210) /
(1 + count()=8.000) - msgscore=-10.210 = 6.691
3.3 TXREP TXREP: Score normalizing based on sender's
reputation
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