diff --git a/app/controllers/api.py b/app/controllers/api.py
index 0c9a765..f84f72c 100644
--- a/app/controllers/api.py
+++ b/app/controllers/api.py
@@ -22,9 +22,9 @@ def query_comments():
 
         logger.info('retrieve comments for token %s, url %s' % (token, url))
         for comment in Comment.select(Comment).join(Site).where(
-               (Comment.url == url) &
-               (Comment.published.is_null(False)) &
-               (Site.token == token)).order_by(+Comment.published):
+                (Comment.url == url) &
+                (Comment.published.is_null(False)) &
+                (Site.token == token)).order_by(+Comment.published):
             d = {}
             d['author'] = comment.author_name
             d['content'] = comment.content
@@ -50,9 +50,9 @@ def get_comments_count():
         token = request.args.get('token', '')
         url = request.args.get('url', '')
         count = Comment.select(Comment).join(Site).where(
-                  (Comment.url == url) & 
-                  (Comment.published.is_null(False)) & 
-                  (Site.token == token)).count()
+            (Comment.url == url) &
+            (Comment.published.is_null(False)) &
+            (Site.token == token)).count()
         r = jsonify({'count': count})
         r.status_code = 200
     except:
diff --git a/app/controllers/mail.py b/app/controllers/mail.py
index 51bbda5..81ec5d1 100644
--- a/app/controllers/mail.py
+++ b/app/controllers/mail.py
@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 
 import logging
-from flask import request, jsonify, abort
+from flask import request, abort
 from app import app
 from app.services import processor
 
diff --git a/app/models/comment.py b/app/models/comment.py
index 1b79a58..1492085 100644
--- a/app/models/comment.py
+++ b/app/models/comment.py
@@ -13,7 +13,7 @@ from app.services.database import get_db
 class Comment(Model):
     url = CharField()
     created = DateTimeField()
-    published = DateTimeField(null=True,default=None)
+    published = DateTimeField(null=True, default=None)
     author_name = CharField()
     author_email = CharField(default='')
     author_site = CharField(default='')
diff --git a/app/run.py b/app/run.py
index 21652ea..6823c3a 100644
--- a/app/run.py
+++ b/app/run.py
@@ -23,6 +23,7 @@ from app.controllers import api
 from app.controllers import mail
 from app import app
 
+
 # configure logging
 def configure_logging(level):
     root_logger = logging.getLogger()
@@ -30,7 +31,8 @@ def configure_logging(level):
     ch = logging.StreamHandler()
     ch.setLevel(level)
     # create formatter
-    formatter = logging.Formatter('[%(asctime)s] %(name)s %(levelname)s %(message)s')
+    formatter = logging.Formatter(
+        '[%(asctime)s] %(name)s %(levelname)s %(message)s')
     # add formatter to ch
     ch.setFormatter(formatter)
     # add ch to logger
@@ -44,7 +46,11 @@ logger = logging.getLogger(__name__)
 # initialize database
 database.setup()
 
-# start processor 
+# routes
+logger.debug('imported: %s ' % api.__name__)
+logger.debug('imported: %s ' % mail.__name__)
+
+# start processor
 template_path = os.path.abspath(os.path.join(current_path, 'templates'))
 processor.start(template_path)
 
diff --git a/app/services/processor.py b/app/services/processor.py
index 0176627..aeeb235 100644
--- a/app/services/processor.py
+++ b/app/services/processor.py
@@ -6,7 +6,6 @@ import re
 from datetime import datetime
 from threading import Thread
 from queue import Queue
-import chardet
 from jinja2 import Environment, FileSystemLoader
 from app.models.site import Site
 from app.models.comment import Comment
@@ -37,7 +36,7 @@ class Processor(Thread):
                     new_comment(msg['data'])
                 elif msg['request'] == 'new_mail':
                     reply_comment_email(msg['data'])
-                #elif req['type'] == 'unsubscribe':
+                # elif req['type'] == 'unsubscribe':
                 #    unsubscribe_reader(req['email'], req['article'])
                 else:
                     logger.info("throw unknown request " + str(msg))
@@ -67,8 +66,8 @@ def new_comment(data):
 
     # add a row to Comment table
     comment = Comment(site=site, url=url, author_name=author_name,
-            author_site=author_site, author_email=author_email,
-            content=message, created=created, published=None)
+                      author_site=author_site, author_email=author_email,
+                      content=message, created=created, published=None)
     comment.save()
 
     # render email body template
@@ -83,17 +82,18 @@ def new_comment(data):
         ''
     )
     comment_text = '\n'.join(comment_list)
-    email_body = get_template('new_comment').render(url=url, comment=comment_text)
+    email_body = get_template('new_comment').render(
+        url=url, comment=comment_text)
 
     # send email
-    # TODO subject should embed a key 
     subject = '%s: [%d:%s]' % (site.name, comment.id, token)
     mail(site.admin_email, subject, email_body)
 
-    # TODO support subscription
     # Reader subscribes to further comments
-    #if subscribe and email:
-    #    subscribe_reader(email, article, url)
+    if subscribe and author_email:
+        # TODO support subscription
+        #  subscribe_reader(email, article, url)
+        pass
 
     logger.debug("new comment processed ")
 
@@ -118,8 +118,6 @@ def reply_comment_email(data):
         logger.warn('ignore corrupted email')
         return
 
-    # TODO validate chardet decoding is no more needed
-    #message = decode_best_effort(message)
     if not message:
         logger.warn('ignore empty email')
         return
@@ -131,7 +129,7 @@ def reply_comment_email(data):
         email_body = get_template('drop_comment').render(original=message)
         mail(email_address, 'Re: ' + subject, email_body)
     else:
-        # update Comment row 
+        # update Comment row
         comment.published = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
         comment.save()
 
@@ -143,12 +141,12 @@ def reply_comment_email(data):
 
         # TODO manage subscriptions
         # notify reader once comment is published
-        #reader_email, article_url = get_email_metadata(message)
-        #if reader_email:
+        # reader_email, article_url = get_email_metadata(message)
+        # if reader_email:
         #    notify_reader(reader_email, article_url)
 
         # notify subscribers every time a new comment is published
-        #notify_subscribers(article)
+        # notify_subscribers(article)
 
 
 def get_email_metadata(message):
@@ -198,14 +196,6 @@ def notify_reader(email, url):
     mail(pecosys.get_config('subscription', 'from_email'), email, subject, email_body)
 
 
-def decode_best_effort(string):
-    info = chardet.detect(string)
-    if info['confidence'] < 0.5:
-        return string.decode('utf8', errors='replace')
-    else:
-        return string.decode(info['encoding'], errors='replace')
-
-
 def mail(to_email, subject, message):
 
     headers = {'Content-Type': 'application/json; charset=utf-8'}
diff --git a/config.py b/config.py
index 174b316..cf0c768 100644
--- a/config.py
+++ b/config.py
@@ -4,7 +4,7 @@ DEBUG = True
 
 LANG = "fr"
 
-#DB_URL = "mysql://stacosys_user:stacosys_password@localhost:3306/stacosys"
+# DB_URL = "mysql://stacosys_user:stacosys_password@localhost:3306/stacosys"
 DB_URL = "sqlite:///db.sqlite"
 
 MAIL_URL = "http://localhost:8025/mbox"