Add some debugging

Dockerfile

@@ -1,6 +1,7 @@
 FROM python:alpine
 
 WORKDIR /usr/src/app
-RUN pip install --no-cache requests configargparse xdg https://github.com/aio-libs/aiosmtpd/archive/refs/heads/master.zip
+RUN pip install --no-cache requests configargparse xdg aiosmtpd
 COPY ./libertyforward.py .
+EXPOSE 25
 CMD ["python", "/usr/src/app/libertyforward.py"]

libertyforward.py

@@ -1,6 +1,6 @@
+from time import sleep
 import requests
-from asyncio import new_event_loop
-from aiosmtpd.controller import UnthreadedController as Controller
+from aiosmtpd.controller import Controller
 from configargparse import ArgParser
 from xdg import xdg_config_home
 
@@ -27,10 +27,10 @@ class MailerHandlerMixin:
         self._api_token = value
 
 
-class KingMailerHandler(MailerHandlerMixin):
+class KingMailerHandler(object):
 
     async def handle_DATA(self, server, session, envelope):
-        print('Incoming mesage from: {}'.format(envelope.mail_from))
+        print('Incoming mesage from: {}'.format(envelope.mail_from), flush=True)
         payload = {
             'mail_from': envelope.mail_from,
             'rcpt_to': envelope.rcpt_tos,
@@ -40,18 +40,23 @@ class KingMailerHandler(MailerHandlerMixin):
         response = requests.post('https://api.kingmailer.co/api/v1/send/raw', data=payload, headers=headers)
         print(response)
         if response.ok:
-            print('Message accepted')
+            print('Message accepted', flush=True)
             return '250 Message accepted for delivery'
         else:
-            print('Could not process')
+            print('Could not process', flush=True)
             return '500 Could not process your message'
 
 
 if __name__ == '__main__':
+    print('Starting LibertyForward', flush=True)
     args = parse_args()
-    loop = new_event_loop()
     handler = KingMailerHandler()
     handler.api_token = args.api_token
-    controller = Controller(handler, hostname='127.0.0.1', port=25, loop=loop)
-    controller.begin()
-    loop.run_forever()
+    controller = Controller(handler, hostname='127.0.0.1', port=25)
+    print('Starting controller thread', flush=True)
+    controller.start()
+    while True:
+        try:
+            sleep(1)
+        except:
+            break