Fix handling of mails with missing headers

pyquarantine/cli.py

@@ -118,7 +118,10 @@ def list_quarantine_emails(config, args):
                 metadata["date"]))
         row["mailfrom"] = metadata["mailfrom"]
         row["recipient"] = metadata["recipients"].pop(0)
-        row["subject"] = emails[quarantine_id]["headers"]["subject"][:60]
+        if "subject" in emails[quarantine_id]["headers"].keys():
+            row["subject"] = emails[quarantine_id]["headers"]["subject"][:60]
+        else
+            row["subject"] = ""
         rows.append(row)
 
         if metadata["recipients"]:

pyquarantine/notifications.py

@@ -353,7 +353,12 @@ class EMailNotification(BaseNotification):
                 "{}: generating notification email for '{}'".format(
                     queueid, recipient))
             self.logger.debug("{}: parsing email template".format(queueid))
-
+            if "from" not in headers.keys():
+                headers["from"] = ""
+            if "to" not in headers.keys():
+                headers["to"] = ""
+            if "subject" not in headers.keys():
+                headers["subject"] = ""
             # generate dict containing all template variables
             variables = defaultdict(str,
                                     EMAIL_HTML_TEXT=sanitized_text,