Bug Tracker item #3141675, was opened at 2010-12-22 13:03
Message generated for change (Tracker Item Submitted) made by unwesen
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Jens Finkhaeuser (unwesen)
Assigned to: Nobody/Anonymous (nobody)
Summary: Unlearning a message is broken
Initial Comment:
I've been trying to figure out why it seems impossible to teach dspam to
unlearn whitelisting. While doing so, I've stumbled across a bug that appears
to be unrelated.
In libdspam.c, ca. line 1280:
if (CTX->classification == DSR_ISINNOCENT)
{
if (CTX->flags & DSF_UNLEARN)
{
if (CTX->classification == DSR_ISSPAM)
{
if (occurrence)
{
ds_term->s.innocent_hits -= ds_term->frequency;
if (ds_term->s.innocent_hits < 0)
ds_term->s.innocent_hits = 0;
} else {
ds_term->s.innocent_hits -= (ds_term->s.innocent_hits>0) ? 1:0;
}
}
So if the email is classified as innocent, and the unlearn flag is set, then
check whether the email is spam before doing anything. How can that be right?
At this point, the email is already known to be innocent, so the check for
whether it's spam must always fail.
A similar issue can be found a few lines further down, ca. 1325.
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