diff --git a/README.md b/README.md
index 8664e10..48624ae 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,48 @@
 # gulag
 Gulag quarantine
+
+## curl examples
+
+### get all QuarMail metadata
+```curl -v -s http://127.0.0.1:9090/api/v1/quarmails | jq
+```
+
+### get all QuarMail metadata + RFC822 messages
+```curl -v -s http://127.0.0.1:9090/api/v1/quarmails?rfc822_message=1 | jq
+```
+
+### get QuarMails metadata by (jqgrid-style) filter
+```curl -v -s -G --data-urlencode 'filters={"groupOp":"OR","rules":[{"field":"hdr_subject","op":"eq","data":"996 test from quar mit sync xyz"}]}' http://127.0.0.1:9090/api/v1/quarmails | jq
+```
+
+### delete a QuarMail by ID
+```curl -v -s -X DELETE http://127.0.0.1:9090/api/v1/quarmails/141 | jq
+```
+
+### get a QuarMail´s metadata by ID
+```curl -v -s http://127.0.0.1:9090/api/v1/quarmails/136 | jq
+```
+
+### get a QuarMail´s metadata by ID + RFC822 message
+```curl -v -s http://127.0.0.1:9090/api/v1/quarmails/136?rfc822_message=1 | jq
+```
+
+### get all URIs of a QuarMail
+```curl -v -s http://127.0.0.1:9090/api/v1/quarmails/136/uris | jq
+```
+
+### get an URI of a QuarMail by ID
+```curl -v -s http://127.0.0.1:9090/api/v1/quarmails/136/uris/249 | jq
+```
+
+### get all attachments metadata of a QuarMail
+```curl -v -s http://127.0.0.1:9090/api/v1/quarmails/136/attachments | jq
+```
+
+### get an attachments metadata of a QuarMail by ID
+```curl -v -s http://127.0.0.1:9090/api/v1/quarmails/136/attachments/71 | jq
+```
+
+### get an attachments metadata of a QuarMail by ID + attachment data
+```curl -v -s http://127.0.0.1:9090/api/v1/quarmails/136/attachments/71?data=1 | jq
+```
diff --git a/app/Gulag.py b/app/Gulag.py
index f514d8d..7c6ecaf 100644
--- a/app/Gulag.py
+++ b/app/Gulag.py
@@ -1,6 +1,8 @@
 import json, sys,os,logging,re,magic
 import email,email.header,email.message
-from GulagDB import GulagDB,GulagDBException
+from GulagDB import (
+  GulagDB,GulagDBException,GulagDBNotFoundException,GulagDBBadInputException
+)
 from GulagMailbox import IMAPmailbox,IMAPmailboxException
 from GulagUtils import whoami,extract_uris,extract_fqdn
 import ssdeep, hashlib
@@ -10,6 +12,16 @@ class GulagException(Exception):
   def __init__(self,message):
     self.message = message
 
+class GulagNotFoundException(Exception):
+  message = None
+  def __init__(self,message):
+    self.message = message
+
+class GulagBadInputException(Exception):
+  message = None
+  def __init__(self,message):
+    self.message = message
+
 class Gulag:
   version = None
   config = None
@@ -231,6 +243,8 @@ class Gulag:
     try:
       self.check_fields('QuarMails',args)
       qms_db = self.db.get_quarmails(args)
+    except GulagDBBadInputException as e:
+      raise GulagBadInputException(whoami(self) + e.message) from e
     except(GulagException,GulagDBException) as e:
       logging.warning(whoami(self) + e.message)
       raise GulagException(whoami(self) + e.message) from e
@@ -278,6 +292,8 @@ class Gulag:
     qm_db = None
     try:
       qm_db = self.db.get_quarmail({"id": args['quarmail_id']})
+    except GulagDBNotFoundException as e:
+      raise GulagNotFoundException(whoami(self) + e.message) from e
     except GulagDBException as e:
       logging.warning(whoami(self) + e.message)
       raise GulagException(whoami(self) + e.message) from e
@@ -287,6 +303,8 @@ class Gulag:
     mailbox = None
     try:
       mailbox = self.db.get_mailbox(qm_db['mailbox_id'])
+    except GulagDBNotFoundException as e:
+      raise GulagNotFoundException(whoami(self) + e.message) from e
     except GulagDBException as e:
       logging.warning(whoami(self) + e.message)
       raise GulagException(whoami(self) + e.message) from e
@@ -306,12 +324,16 @@ class Gulag:
     qm_db = None
     try:
       qm_db = self.db.get_quarmail({"id": args['quarmail_id']})
+    except GulagDBNotFoundException as e:
+      raise GulagNotFoundException(whoami(self) + e.message) from e
     except GulagDBException as e:
       logging.warning(whoami(self) + e.message)
       raise GulagException(whoami(self) + e.message) from e
     mailbox = None
     try:
       mailbox = self.db.get_mailbox(qm_db['mailbox_id'])
+    except GulagDBNotFoundException as e:
+      raise GulagNotFoundException(whoami(self) + e.message) from e
     except GulagDBException as e:
       logging.warning(whoami(self) + e.message)
       raise GulagException(whoami(self) + e.message) from e
@@ -341,7 +363,7 @@ class Gulag:
       logging.warning(whoami(self) + e.message)
       raise GulagException(whoami(self) + e.message) from e
     imap_mb.close()
-    return True
+    return
 
   def get_quarmail_attachments(self,args):
     try:
@@ -356,6 +378,8 @@ class Gulag:
       qmat_db = self.db.get_quarmail_attachment(
         args['quarmail_id'],args['attachment_id']
       )
+    except GulagDBNotFoundException as e:
+      raise GulagNotFoundException(whoami(self) + e.message) from e
     except GulagDBException as e:
       logging.warning(whoami(self) + e.message)
       raise GulagException(whoami(self) + e.message) from e
@@ -365,6 +389,8 @@ class Gulag:
     mailbox = None
     try:
       mailbox = self.db.get_mailbox(qmat_db['mailbox_id'])
+    except GulagDBNotFoundException as e:
+      raise GulagNotFoundException(whoami(self) + e.message) from e
     except GulagDBException as e:
       logging.warning(whoami(self) + e.message)
       raise GulagException(whoami(self) + e.message) from e
@@ -384,6 +410,8 @@ class Gulag:
     at_db = None
     try:
       at_db = self.db.get_attachment({"id": args['id']})
+    except GulagDBNotFoundException as e:
+      raise GulagNotFoundException(whoami(self) + e.message) from e
     except GulagDBException as e:
       raise GulagException(whoami(self) + e.message) from e
     if 'data' not in args:
@@ -399,12 +427,16 @@ class Gulag:
     qm_db = None
     try:
       qm_db = self.db.get_quarmail({"id": args['quarmail_id']})
+    except GulagDBNotFoundException as e:
+      raise GulagNotFoundException(whoami(self) + e.message) from e
     except GulagDBException as e:
       logging.warning(whoami(self) + e.message)
       raise GulagException(whoami(self) + e.message) from e
     mailbox = None
     try:
       mailbox = self.db.get_mailbox(qm_db['mailbox_id'])
+    except GulagDBNotFoundException as e:
+      raise GulagNotFoundException(whoami(self) + e.message) from e
     except GulagDBException as e:
       logging.warning(whoami(self) + e.message)
       raise GulagException(whoami(self) + e.message) from e
@@ -424,10 +456,20 @@ class Gulag:
       logging.warning(whoami(self) + e.message)
       raise GulagException(whoami(self) + e.message) from e
 
+  def get_quarmail_uri(self,args):
+    try:
+      return self.db.get_quarmail_uri(args['quarmail_id'],args['uri_id'])
+    except GulagDBNotFoundException as e:
+      raise GulagNotFoundException(whoami(self) + e.message) from e
+    except GulagDBException as e:
+      raise GulagException(whoami(self) + e.message) from e
+
   def rspamd_http2imap(self,args):
     mailbox = None
     try:
       mailbox = self.db.get_mailbox(args['mailbox_id'])
+    except GulagDBNotFoundException as e:
+      raise GulagNotFoundException(whoami(self) + e.message) from e
     except GulagDBException as e:
       raise GulagException(whoami(self) + e.message) from e
     # check if the request comes really from rspamd´s metadata_exporter
diff --git a/app/GulagDB.py b/app/GulagDB.py
index d7e5a51..9c59897 100644
--- a/app/GulagDB.py
+++ b/app/GulagDB.py
@@ -11,6 +11,16 @@ class GulagDBException(Exception):
   def __init__(self,message):
     self.message = str(message)
 
+class GulagDBNotFoundException(Exception):
+  message = None
+  def __init__(self,message):
+    self.message = str(message)
+
+class GulagDBBadInputException(Exception):
+  message = None
+  def __init__(self,message):
+    self.message = str(message)
+
 class GulagDB:
   conn = None
   uri_prefixes = None
@@ -51,8 +61,8 @@ class GulagDB:
       cursor.execute(query)
       data = cursor.fetchall()
       if not data:
-        raise GulagDBException(whoami(self)
-          + "describe " + table_name + " failed!"
+        raise GulagDBNotFoundException(whoami(self)
+          + "describe " + table_name + " failed: got no fields!"
         )
       desc = cursor.description
       cursor.close()
@@ -70,21 +80,25 @@ class GulagDB:
       try:
         int(args['query_offset'])
       except ValueError:
-        raise GulagDBException(whoami(self) + "query_offset must be numeric!")
+        raise GulagDBBadInputException(whoami(self) +
+          "query_offset must be numeric!"
+        )
       try:
         int(args['query_limit'])
       except ValueError:
-        raise GulagDBException(whoami(self) + "query_limit must be numeric!")
+        raise GulagDBBadInputException(whoami(self) +
+          "query_limit must be numeric!"
+        )
       return "limit "+args['query_offset']+","+args['query_limit']
     elif('query_offset' in args and 'query_limit' not in args):
-      raise GulagDBException(whoami(self) +
+      raise GulagDBBadInputException(whoami(self) +
         "query_offset without query_limit is useless!"
       )
     elif('query_limit' in args and 'query_offset' not in args):
       try:
         int(args['query_limit'])
       except ValueError:
-        raise GulagDBException(whoami(self) + "query_limit must be numeric!")
+        raise GulagDBBadInputException(whoami(self) + "query_limit must be numeric!")
       return "limit " + args['query_limit']
     else:
       return ""
@@ -110,21 +124,31 @@ class GulagDB:
   def get_where_clause_from_filters(self,filters):
     # {"groupOp":"AND","rules":[{"field":"uri_count","op":"eq","data":"3"}]}
     if 'rules' not in filters:
-      raise GulagDBException(whoami(self) + "no 'rules' found in filters!")
+      raise GulagDBBadInputException(whoami(self) +
+        "no 'rules' found in filters!"
+      )
     if 'groupOp' not in filters:
-      raise GulagDBException(whoami(self) + "'groupOp' not found in filters!")
+      raise GulagDBBadInputException(whoami(self) +
+        "'groupOp' not found in filters!"
+      )
     if filters['groupOp'] != 'AND' and filters['groupOp'] != 'OR':
-      raise GulagDBException(whoami(self) +
+      raise GulagDBBadInputException(whoami(self) +
         "invalid 'groupOp': " + filters['groupOp']
       )
     where_clause = ""
     for rule in filters['rules']:
       if 'field' not in rule:
-        raise GulagDBException(whoami(self) + "'field' not found in rule!")
+        raise GulagDBBadInputException(whoami(self) +
+          "'field' not found in rule!"
+        )
       if 'op' not in rule:
-        raise GulagDBException(whoami(self) + "'op' not found in rule!")
+        raise GulagDBBadInputException(whoami(self) +
+          "'op' not found in rule!"
+        )
       if 'data' not in rule:
-        raise GulagDBException(whoami(self) + "'data' not found in rule!")
+        raise GulagDBBadInputException(whoami(self) +
+          "'data' not found in rule!"
+        )
       field_op_data = None
       if(rule['op'] == 'eq'):
         field_op_data = rule['field'] + "='" + rule['data'] + "'"
@@ -141,7 +165,9 @@ class GulagDB:
       elif(rule['op'] == 'lt'):
         field_op_data = rule['field'] + " < '" + rule['data'] + "'"
       if(field_op_data == None):
-        raise GulagDBException(whoami(self) + "invalid rule-op: " + rule['op'])
+        raise GulagDBBadInputException(whoami(self) +
+          "invalid rule-op: " + rule['op']
+        )
       if(len(filters['rules']) == 1 or len(where_clause) == 0):
         if rule['field'] in self.vcols:
           where_clause = "having " + field_op_data
@@ -158,7 +184,7 @@ class GulagDB:
       results = []
       data = cursor.fetchall()
       if not data:
-        raise GulagDBException(whoami(self) + "No mailboxes found in DB!")
+        return results
       desc = cursor.description
       for tuple in data:
         dict = {}
@@ -182,7 +208,7 @@ class GulagDB:
       )
       data = cursor.fetchall()
       if not data:
-        raise GulagDBException(whoami(self)
+        raise GulagDBNotFoundException(whoami(self)
           + "Mailbox '" + mailbox_id + "' does not exist!"
         )
       desc = cursor.description
@@ -259,6 +285,8 @@ class GulagDB:
         dict['href'] = self.uri_prefixes['quarmails'] + str(dict['id'])
         results.append(QuarMail(dict).__dict__)
       return results
+    except GulagDBBadInputException as e:
+      raise GulagDBBadInputException(whoami(self) + e.message) from e
     except GulagDBException as e:
       raise GulagDBException(whoami(self) + e.message) from e
     except mariadb.Error as e:
@@ -275,7 +303,7 @@ class GulagDB:
       cursor.execute(query)
       data = cursor.fetchall()
       if not data:
-        raise GulagDBException(whoami(self)
+        raise GulagDBNotFoundException(whoami(self)
           + "Quarmail with id '"+ str(args['id']) + "' does not exist!"
         )
       desc = cursor.description
@@ -288,10 +316,6 @@ class GulagDB:
         else:
           dict[name[0]] = value
       dict['href'] = self.uri_prefixes['quarmails'] + str(dict['id'])
-#      try:
-#        dict['attachments'] = self.get_attachments_by_quarmail(args['id'])
-#      except GulagDBException as e:
-#        pass
       return QuarMail(dict).__dict__
     except mariadb.Error as e:
       raise GulagDBException(whoami(self) + str(e)) from e
@@ -363,7 +387,7 @@ class GulagDB:
       cursor.execute(query)
       data = cursor.fetchall()
       if not data:
-        raise GulagDBException(whoami(self)
+        raise GulagDBNotFoundException(whoami(self)
           + "Attachment("+ str(args['id']) +") does not exist!"
         )
       desc = cursor.description
@@ -413,8 +437,9 @@ class GulagDB:
       cursor.execute(query)
       data = cursor.fetchall()
       if not data:
-        raise GulagDBException(whoami(self) + "QuarMail("+ str(quarmail_id) +") "
-          + "has no attachment (" + str(attachment_id) + ")!"
+        raise GulagDBNotFoundException(whoami(self) +
+          "QuarMail("+ str(quarmail_id) +") " +
+          "has no attachment (" + str(attachment_id) + ")!"
         )
       desc = cursor.description
       tuple = data[0]
@@ -497,6 +522,36 @@ class GulagDB:
     except mariadb.Error as e:
       raise GulagDBException(whoami(self) + str(e)) from e
 
+  def get_quarmail_uri(self,quarmail_id,uri_id):
+    try:
+      query = "select URIs.*"
+      query += " from QuarMail2URI"
+      query += " left join QuarMails ON QuarMails.id = QuarMail2URI.quarmail_id"
+      query += " left join URIs ON URIs.id = QuarMail2URI.uri_id"
+      query += " where QuarMails.id = " + str(quarmail_id)
+      query += " and URIs.id = " + str(uri_id) + ";"
+      cursor = self.conn.cursor()
+      cursor.execute(query)
+      data = cursor.fetchall()
+      if not data:
+        raise GulagDBNotFoundException(whoami(self) +
+          "QuarMail("+ str(quarmail_id) +")" +
+          " has no uri (" + str(uri_id) + ")!"
+        )
+      desc = cursor.description
+      tuple = data[0]
+      dict = {}
+      for (name, value) in zip(desc, tuple):
+        dict[name[0]] = value
+        dict['href'] = self.uri_prefixes['quarmails'] + str(quarmail_id)
+        dict['href'] += "/uris/" + str(dict['id'])
+      try:
+        return URI(dict).__dict__
+      except URIException as e:
+        raise GulagDBException(whoami(self) + e.message) from e
+    except mariadb.Error as e:
+      raise GulagDBException(whoami(self) + str(e)) from e
+
   def delete_quarmail_uris(self, quarmail_id):
     cursor = None
     try:
diff --git a/app/Resources.py b/app/Resources.py
index 7f95c0e..2dd40a3 100644
--- a/app/Resources.py
+++ b/app/Resources.py
@@ -1,7 +1,9 @@
-from flask import request
+from flask import request, Response
 from flask_restful import Resource, abort, reqparse
-from Gulag import GulagException
 import json
+from Gulag import (
+  GulagException,GulagNotFoundException,GulagBadInputException
+)
 
 class GulagResource(Resource):
   gulag = None
@@ -37,7 +39,7 @@ class ResMailboxes(GulagResource):
     try:
       return self.gulag.get_mailboxes()
     except GulagException as e:
-      abort(400, message=e.message)
+      abort(500, message=e.message)
 
 class ResMailbox(GulagResource):
   def get(self,id):
@@ -50,11 +52,13 @@ class ResQuarMails(GulagResource):
       try:
         args['filters'] = json.loads(args['filters'])
       except json.JSONDecodeError as e:
-        abort(400, message=whoami(self) + "JSON parse error: " + e.msg)
+        abort(400, message="Invalid filters: " + e.msg)
     try:
       return self.gulag.get_quarmails(args)
-    except GulagException as e:
+    except GulagBadInputException as e:
       abort(400, message=e.message)
+    except GulagException as e:
+      abort(500, message=e.message)
 
 class ResQuarMail(GulagResource):
   def get(self,quarmail_id):
@@ -63,14 +67,19 @@ class ResQuarMail(GulagResource):
       if(request.args.get('rfc822_message')):
         args['rfc822_message'] = True
       return self.gulag.get_quarmail(args)
+    except GulagNotFoundException as e:
+      abort(404, message=e.message)
     except GulagException as e:
-      abort(400, message=e.message)
+      abort(500, message=e.message)
   def delete(self,quarmail_id):
     args = {"quarmail_id": quarmail_id}
     try:
-      return self.gulag.delete_quarmail(args)
+      self.gulag.delete_quarmail(args)
+      return Response(response=None,status=202,mimetype=None)
+    except GulagNotFoundException as e:
+      abort(404, message=e.message)
     except GulagException as e:
-      abort(400, message=e.message)
+      abort(500, message=e.message)
 
 class ResQuarMailAttachments(GulagResource):
   def get(self,quarmail_id):
@@ -80,7 +89,7 @@ class ResQuarMailAttachments(GulagResource):
     try:
       return self.gulag.get_quarmail_attachments(args)
     except GulagException as e:
-      abort(400, message=e.message)
+      abort(500, message=e.message)
 
 class ResQuarMailAttachment(GulagResource):
   def get(self,quarmail_id,attachment_id):
@@ -92,8 +101,10 @@ class ResQuarMailAttachment(GulagResource):
       args['data'] = True
     try:
       return self.gulag.get_quarmail_attachment(args)
+    except GulagNotFoundException as e:
+      abort(404, message=e.message)
     except GulagException as e:
-      abort(400, message=e.message)
+      abort(500, message=e.message)
 
 class ResQuarMailURIs(GulagResource):
   def get(self,quarmail_id):
@@ -101,11 +112,24 @@ class ResQuarMailURIs(GulagResource):
       "quarmail_id": quarmail_id
     }
     if(request.args.get('from_rfc822_message')):
-        args['from_rfc822_message'] = True
+      args['from_rfc822_message'] = True
     try:
       return self.gulag.get_quarmail_uris(args)
     except GulagException as e:
-      abort(400, message=e.message)
+      abort(500, message=e.message)
+
+class ResQuarMailURI(GulagResource):
+  def get(self,quarmail_id,uri_id):
+    args = {
+      "quarmail_id": quarmail_id,
+      "uri_id": uri_id
+    }
+    try:
+      return self.gulag.get_quarmail_uri(args)
+    except GulagNotFoundException as e:
+      abort(404, message=e.message)
+    except GulagException as e:
+      abort(500, message=e.message)
 
 class ResAttachments(GulagResource):
   def get(self):
@@ -116,8 +140,10 @@ class ResAttachment(GulagResource):
     args = {"id": attachment_id}
     try:
       return self.gulag.get_attachment(args)
+    except GulagNotFoundException as e:
+      abort(404, message=e.message)
     except GulagException as e:
-      abort(400, message=e.message)
+      abort(500, message=e.message)
 
 class ResRSPAMDImporter(GulagResource):
   def post(self,mailbox_id):
@@ -127,8 +153,15 @@ class ResRSPAMDImporter(GulagResource):
         "req_headers": request.headers,
         "rfc822_message": request.get_data(as_text=True)
       })
-      # TODO: Response mit Location-Header?
-      # https://stackoverflow.com/a/22707491
-      return {"resource: ": "HTTP2IMAP for RSPAMD"}
+      return {}
+    #  response = Response(
+    #    response=json.dumps(resp),
+    #    status=201,
+    #    mimetype='application/json',
+    #    headers=Headers([
+    #      ('Location', 'https://invalid.local/api/v1/blablabla/123')
+    #    ])
+    #  )
+    #  return response
     except GulagException as e:
-      abort(400, message=e.message)
+      abort(500, message=e.message)
diff --git a/app/gulag_server.py b/app/gulag_server.py
index 3bc713e..f803767 100755
--- a/app/gulag_server.py
+++ b/app/gulag_server.py
@@ -7,7 +7,7 @@ from Gulag import Gulag,GulagException
 from Resources import (ResRoot,ResMailboxes,
   ResQuarMails,ResQuarMail,ResQuarMailAttachments,
   ResQuarMailAttachment,ResAttachments,ResAttachment,
-  ResRSPAMDImporter,ResQuarMailURIs
+  ResRSPAMDImporter,ResQuarMailURIs,ResQuarMailURI
 )
 parser = argparse.ArgumentParser()
 parser.add_argument('--config', required=True, help="Path to config file")
@@ -19,6 +19,8 @@ try:
   except GulagException as e:
     raise Exception(e.message) from e
   app = Flask(__name__)
+  # https://github.com/flask-restful/flask-restful/issues/780#issuecomment-434588559
+  app.config['ERROR_404_HELP'] = False
   api = Api(app, catch_all_404s=True)
   api.add_resource(ResRoot,
     '/api/v1/',
@@ -48,6 +50,10 @@ try:
     '/api/v1/quarmails/<int:quarmail_id>/uris',
     resource_class_kwargs={'gulag_object': gulag}
   )
+  api.add_resource(ResQuarMailURI,
+    '/api/v1/quarmails/<int:quarmail_id>/uris/<int:uri_id>',
+    resource_class_kwargs={'gulag_object': gulag}
+  )
   api.add_resource(ResAttachments,
     '/api/v1/attachments',
     resource_class_kwargs={'gulag_object': gulag}
diff --git a/docker-build.sh b/docker-build.sh
index e7edb3c..7483879 100755
--- a/docker-build.sh
+++ b/docker-build.sh
@@ -22,7 +22,11 @@ fi
 IMAGES="gulag-server gulag-db"
 
 for IMAGE in ${IMAGES}; do
-  /usr/bin/docker build -t "${IMAGE}/${BASEOS}:${VERSION}_${BRANCH}" -f "docker/${IMAGE}/${BASEOS}/Dockerfile" .
+  /usr/bin/docker build \
+    --build-arg http_proxy=http://wprx-zdf.zwackl.local:3128 \
+    --build-arg https_proxy=http://wprx-zdf.zwackl.local:3128 \
+    -t "${IMAGE}/${BASEOS}:${VERSION}_${BRANCH}" \
+    -f "docker/${IMAGE}/${BASEOS}/Dockerfile" .
 #  /usr/bin/docker tag "${IMAGE}/${BASEOS}:${VERSION}_${BRANCH}" "${REGISTRY}/${IMAGE}/${BASEOS}:${VERSION}_${BRANCH}"
 done
 
@@ -30,4 +34,3 @@ done
 #for IMAGE in ${IMAGES}; do
 #  /bin/echo "/usr/bin/docker push ${REGISTRY}/${IMAGE}/${BASEOS}:${VERSION}_${BRANCH}"
 #done
-
diff --git a/docker/gulag-db/debian/Dockerfile b/docker/gulag-db/debian/Dockerfile
index 542943e..8c89103 100644
--- a/docker/gulag-db/debian/Dockerfile
+++ b/docker/gulag-db/debian/Dockerfile
@@ -1,3 +1,5 @@
+ARG http_proxy
+ARG https_proxy
 FROM debian
 RUN apt update && \
   apt -yq --no-install-recommends install procps net-tools mariadb-server mariadb-client
diff --git a/docker/gulag-server/debian/Dockerfile b/docker/gulag-server/debian/Dockerfile
index 49cea62..d5af9c1 100644
--- a/docker/gulag-server/debian/Dockerfile
+++ b/docker/gulag-server/debian/Dockerfile
@@ -1,17 +1,19 @@
+ARG http_proxy
+ARG https_proxy
 FROM debian
 LABEL maintainer="Dominik Chilla"
 
 ENV DEBIAN_FRONTEND=noninteractive \
  TZ=Europe/Berlin
 
-RUN set -ex ; \
+RUN env; set -ex ; \
     apt-get -qq update \
  && apt-get -qq --no-install-recommends install \
       uwsgi-plugin-python3 python3-setuptools python3-flask \
       python3-flask-restful python3-mysql.connector \
       uwsgi uwsgi-plugin-python3 procps net-tools \
       python3-pip libmagic1 python3-ssdeep \
- && pip3 install python-magic
+ && pip3 install python-magic \
+ && /bin/mkdir /config /socket /app
 
-RUN /bin/mkdir /config /socket /app
 COPY app/*.py /app/
diff --git a/gulag-openapi-2.0.yaml b/gulag-openapi-2.0.yaml
index ad06330..8add3d5 100644
--- a/gulag-openapi-2.0.yaml
+++ b/gulag-openapi-2.0.yaml
@@ -1,6 +1,6 @@
 swagger: '2.0'
 info:
-  description: Gulag quarantine REST API
+  description: https://app.swaggerhub.com/apis/DC-IT-Consulting/Gulag/1.0.0#/
   version: "1.0.0"
   title: Gulag quarantine REST API
   contact:
@@ -173,10 +173,10 @@ paths:
         required: true
         type: integer
       responses:
-        200:
+        202:
           description: quarantined email deleted
-        400:
-          description: bad input parameter
+        404:
+          description: not found
         500:
           description: server error
 
@@ -228,11 +228,11 @@ paths:
         required: false
       responses:
         200:
-          description: quarantined email object
+          description: attachment object
           schema:
             $ref: '#/definitions/Attachment'
-        400:
-          description: bad input parameter
+        404:
+          description: not found
         500:
           description: server error
 
@@ -265,6 +265,33 @@ paths:
         500:
           description: server error
 
+  /quarmails/{quarmail_id}/uris/{uri_id}:
+    get:
+      summary: "returns an URI by ID"
+      operationId: get_quarmail_uri
+      produces:
+      - application/json
+      parameters:
+      - in: path
+        name: quarmail_id
+        description: unique id of quarantined email
+        required: true
+        type: string
+      - in: path
+        name: uri_id
+        description: id of URI to fetch
+        required: true
+        type: string
+      responses:
+        200:
+          description: URI object
+          schema:
+            $ref: '#/definitions/URI'
+        404:
+          description: not found
+        500:
+          description: server error
+
 definitions:
   QuarMail:
     type: object