ignore undelivered mail notifications

example_configs/pmml_deployment.yml

@@ -16,7 +16,7 @@ spec:
     spec:
       containers:
       - name: pmml
-        image: torarg/pmml:0.1.3
+        image: torarg/pmml:0.1.4
         volumeMounts:
         - mountPath: "/.pmmlrc"
           subPath: ".pmmlrc"

pmml.py

@@ -28,13 +28,18 @@ def setup_smtp_session(smtp_server, smtp_port, smtp_user, smtp_pass):
 @click.option("-f", "--config-file", default=DEFAULT_CONFIG_FILE_PATH)
 @click.argument("mailing-list-address")
 def cli(config_file, mailing_list_address):
+    ignore_subjects = ("Undelivered Mail Returned to Sender",)
     input = sys.stdin
     config = read_config_file(config_file)[mailing_list_address]
     msg = email.parser.Parser().parse(input)
-    smtp_client = setup_smtp_session(config['smtp_server'], config['smtp_port'],
+
+    if msg['Subject'] in ignore_subjects:
+        print(f"Skipping mail processing because auf subject: {msg['Subject']}")
+    else:
+        smtp_client = setup_smtp_session(config['smtp_server'], config['smtp_port'],
                                      config['smtp_user'], config['smtp_pass'])
-    smtp_client.sendmail(mailing_list_address, config['recipients'], msg.as_string())
-    smtp_client.quit()
+        smtp_client.sendmail(mailing_list_address, config['recipients'], msg.as_string())
+        smtp_client.quit()
 
 if __name__ == '__main__':
     cli()