Invert logic

src/freedombone-unignore

 
 # unignore if subject line contains text
 if [ $SUBJECT_TEXT ]; then
-    if ! grep -q "Ignore rule for $SUBJECT_TEXT" $PM; then
+    if grep -q "Ignore rule for $SUBJECT_TEXT" $PM; then
         sed -i "/# Ignore rule for $SUBJECT_TEXT/,/# End of ignore rule/d" $PM
     fi
 fi