diff --git a/relay.yaml.example b/relay.yaml.example
index 22195d6..4f0b69c 100644
--- a/relay.yaml.example
+++ b/relay.yaml.example
@@ -14,3 +14,7 @@ ap:
   # this is used for generating activitypub messages, as well as instructions for
   # linking AP identities.  it should be an SSL-enabled domain reachable by https.
   host: 'relay.example.com'
+  blocked_instances:
+  - 'bad-instance.example.com'
+  - 'another-bad-instance.example.com'
+  
diff --git a/relay/actor.py b/relay/actor.py
index b8ff942..8ddcf0e 100644
--- a/relay/actor.py
+++ b/relay/actor.py
@@ -3,9 +3,9 @@ import aiohttp.web
 import asyncio
 import logging
 import uuid
+import re
 import urllib.parse
 import simplejson as json
-import re
 import cgi
 from Crypto.PublicKey import RSA
 from .database import DATABASE
@@ -32,7 +32,7 @@ from . import app, CONFIG
 from .remote_actor import fetch_actor
 
 
-AP_CONFIG = CONFIG.get('ap', {'host': 'localhost'})
+AP_CONFIG = CONFIG.get('ap', {'host': 'localhost','blocked_instances':[]})
 
 
 async def actor(request):
@@ -186,6 +186,9 @@ async def handle_follow(actor, data, request):
     following = DATABASE.get('relay-list', [])
     inbox = get_actor_inbox(actor)
 
+    if urllib.parse.urlsplit(inbox).hostname in AP_CONFIG['blocked_instances']:
+        return
+
     if inbox not in following:
         following += [inbox]
         DATABASE['relay-list'] = following
diff --git a/relay/database.py b/relay/database.py
index 857af93..0d171a0 100644
--- a/relay/database.py
+++ b/relay/database.py
@@ -1,5 +1,6 @@
 import asyncio
 import logging
+import urllib.parse
 import simplejson as json
 
 
@@ -13,6 +14,11 @@ except:
     logging.info('No database was found, making a new one.')
     DATABASE = {}
 
+following = DATABASE.get('relay-list', [])
+for inbox in following:
+    if urllib.parse.urlsplit(inbox).hostname in CONFIG['ap']['blocked_instances']:
+        following.remove(inbox)
+        DATABASE['relay-list'] = following
 
 async def database_save():
     while True:
diff --git a/relay/default.py b/relay/default.py
index 172c9d3..638e0c7 100644
--- a/relay/default.py
+++ b/relay/default.py
@@ -1,11 +1,13 @@
 import aiohttp.web
-import re
+import urllib.parse
 from . import app, CONFIG
 from .database import DATABASE
 
 host = CONFIG['ap']['host']
 note = CONFIG['note']
-targets = '<br>'.join([re.search('https://(.*)/inbox',target).group(1) for target in DATABASE.get('relay-list', [])])
+
+inboxes = DATABASE.get('relay-list', [])
+targets = '<br>'.join([urllib.parse.urlsplit(target).hostname for target in inboxes])
 
 async def default(request):
     return aiohttp.web.Response(
@@ -26,9 +28,9 @@ async def default(request):
 <p>For Mastodon instances, you may subscribe to this relay with the address: <a href="https://{host}/inbox">https://{host}/inbox</a></p>
 <p>For Pleroma and other instances, you may subscribe to this relay with the address: <a href="https://{host}/actor">https://{host}/actor</a></p>
 <p>To host your own relay, you may download the code at this address: <a href="https://git.pleroma.social/pleroma/relay">https://git.pleroma.social/pleroma/relay</a></p>
-<br><p>List of registered instances:<br>{targets}</p>
+<br><p>List of {count} registered instances:<br>{targets}</p>
 </body></html>
 
-""".format(host=host, note=note,targets=targets))
+""".format(host=host, note=note,targets=targets,count=len(inboxes)))
 
 app.router.add_get('/', default)