Update of /cvsroot/mahogany/M/src/modules
In directory usw-pr-cvs1:/tmp/cvs-serv768/src/modules
Modified Files:
Filters.cpp
Log Message:
added a SPAM test for the suspicious "Received: " headers
Index: Filters.cpp
===================================================================
RCS file: /cvsroot/mahogany/M/src/modules/Filters.cpp,v
retrieving revision 1.127
retrieving revision 1.128
diff -b -u -2 -r1.127 -r1.128
--- Filters.cpp 4 Jul 2002 17:22:38 -0000 1.127
+++ Filters.cpp 8 Jul 2002 14:25:31 -0000 1.128
@@ -1988,4 +1988,17 @@
}
+// check the value of Received headers and return true if we believe they
+// indicate that this is a spam
+static bool CheckReceivedHeaders(const String& value)
+{
+ // "Received: from unknown" is very suspicious
+ const char *pc = strstr(value, "from unknown");
+ if ( !pc )
+ return false;
+
+ // it should be in the beginning of the header line
+ return pc == value.c_str() || *(pc - 1) == '\n';
+}
+
// check if we have an HTML-only message
static bool CheckForHTMLOnly(const Message *msg)
@@ -2101,4 +2114,9 @@
rc = msg->GetHeaderLine("X-Authentication-Warning", value) &&
CheckXAuthWarning(value);
+ }
+ else if ( test == SPAM_TEST_RECEIVED )
+ {
+ rc = msg->GetHeaderLine("Received", value) &&
+ CheckReceivedHeaders(value);
}
else if ( test == SPAM_TEST_HTML )
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