diff --git a/BusinessMonitor.MailTools/Spf/SpfCheck.cs b/BusinessMonitor.MailTools/Spf/SpfCheck.cs
index 632ec7a..f7ca3e0 100644
--- a/BusinessMonitor.MailTools/Spf/SpfCheck.cs
+++ b/BusinessMonitor.MailTools/Spf/SpfCheck.cs
@@ -79,6 +79,11 @@ private SpfRecord GetRecord(string domain)
                 throw new SpfNotFoundException("No SPF record found on domain");
             }
 
+            if (record.Length > 1)
+            {
+                throw new SpfNotFoundException("Too many SPF records found on domain");
+            }
+            
             // Parse and validate the record and return it
             var parsed = ParseSpfRecord(record);