don't print blank lines in log if no valid SPF result

1 files changed, 4 insertions, 2 deletions

diff --git a/tools/sepofra.c b/tools/sepofra.c
index 25b73b7..0a731b9 100644
--- a/tools/sepofra.c
+++ b/tools/sepofra.c
@@ -123,13 +123,15 @@ void sepofra::check(
   return;
 }
 
+// return "" if result is invalid
+// otherwise build a string explaining how SPF reached its conclusion
 string sepofra::explain() const {
     if (result == SPF_RESULT_INVALID) return "";
-// now build a string
     stringstream build;
     string summary = SPF_strresult(result);
     if (result != SPF_RESULT_PASS
-     && result != SPF_RESULT_FAIL) summary = "neutral";
+     && result != SPF_RESULT_FAIL
+     && result != SPF_RESULT_INVALID) summary = "neutral";
 
     char hostname[1+HOST_NAME_MAX];
     gethostname(hostname, 1+HOST_NAME_MAX);