[Minor] check for spam flag from United Internet

This header is present for most outgoing messages from United Internet which
includes "web.de" and GMX (freemailers which are very popular in Germany) as
well as messages sent from 1and1 webhosting packages.

1 files changed, 7 insertions, 0 deletions

diff --git a/rules/regexp/upstream_spam_filters.lua b/rules/regexp/upstream_spam_filters.lua
index be792a318..f96d293d3 100644
--- a/rules/regexp/upstream_spam_filters.lua
+++ b/rules/regexp/upstream_spam_filters.lua
@@ -46,3 +46,10 @@ reconf['SPAM_FLAG'] = {
     description = "Message was already marked as spam",
     group = 'upstream_spam_filters'
 }
+
+reconf['UNITEDINTERNET_SPAM'] = {
+    re = 'X-UI-Out-Filterresults=/^junk:/H',
+    score = 5,
+    description = "United Internet says this message is spam",
+    group = 'upstream_spam_filters'
+}