introduce email bounce address, follow up on #221

app/email.py

@@ -42,10 +42,10 @@ def send_welcome_email(user, application_required):
 @celery.task
 def send_async_email(subject, sender, recipients, text_body, html_body, reply_to):
     if 'ngrok.app' in sender:   # for local development
-        sender = f'{g.site.name} <{current_app.config["MAIL_FROM"]}>'
+        sender = 'PieFed <noreply@piefed.social'
         return_path = 'bounces@piefed.social'
     else:
-        return_path = 'bounces@' + current_app.config['SERVER_NAME']
+        return_path = current_app.config['BOUNCE_ADDRESS']
     # NB email will not be sent if you have not verified your domain name as an 'Identity' inside AWS SES
     if type(recipients) == str:
         recipients = [recipients]

config.py

@@ -38,6 +38,7 @@ class Config(object):
     BOUNCE_HOST = os.environ.get('BOUNCE_HOST') or ''
     BOUNCE_USERNAME = os.environ.get('BOUNCE_USERNAME') or ''
     BOUNCE_PASSWORD = os.environ.get('BOUNCE_PASSWORD') or ''
+    BOUNCE_ADDRESS = os.environ.get('BOUNCE_ADDRESS') or MAIL_FROM or ''
 
     SENTRY_DSN = os.environ.get('SENTRY_DSN') or None
 

env.sample

@@ -21,6 +21,7 @@ CACHE_REDIS_URL='redis://localhost:6379/1'
 BOUNCE_HOST=''
 BOUNCE_USERNAME=''
 BOUNCE_PASSWORD=''
+BOUNCE_ADDRESS=''
 
 FLASK_APP = 'pyfedi.py'
 SENTRY_DSN = ''