Update to not send mails in case nothing changes

Future TODO: Send update if expiry is close (< 30 days)

sysadmin/letsencrypt_mail.py

@@ -44,17 +44,16 @@ def main():
         elif "unexpected error occurred" in line:
             state = State.error
 
-    text = "\n".join(text)
-    subject = SUBJECT.format(str(state))
-    message = drymail.Message(
-        sender=("Certbot renewal bot", "notify@dennogumi.org"),
-        receivers=["root"],
-        subject=subject,
-        headers=HEADER,
-        text=text
-    )
-
-
+    if state is not State.no_action:
+        text = "\n".join(text)
+        subject = SUBJECT.format(str(state))
+        message = drymail.Message(
+            sender=("Certbot renewal bot", "notify@dennogumi.org"),
+            receivers=["root"],
+            subject=subject,
+            headers=HEADER,
+            text=text
+        )
 
     client = drymail.SMTPMailer(
         host='localhost')