diff --git a/filters.py b/filters.py
index 1382f3ded..77968a47d 100644
--- a/filters.py
+++ b/filters.py
@@ -100,10 +100,13 @@ def remove_global_filter(base_dir: str, words: str) -> bool:
 def _is_twitter_post(content: str) -> bool:
     """Returns true if the given post content is a retweet or twitter crosspost
     """
-    if '/twitter.' in content or '@twitter.' in content:
-        return True
-    if '>RT <' in content:
-        return True
+    features = (
+        '/twitter.', '/nitter.', '@twitter.', '@nitter.',
+        '>RT <', '_tw<', '_tw@', 'tweet', 'Tweet'
+    )
+    for feat in features:
+        if feat in content:
+            return True
     return False
 
 
diff --git a/inbox.py b/inbox.py
index 3617676b0..1ed30a05f 100644
--- a/inbox.py
+++ b/inbox.py
@@ -18,6 +18,8 @@ from languages import understood_post_language
 from like import update_likes_collection
 from reaction import update_reaction_collection
 from reaction import valid_emoji_content
+from utils import get_media_descriptions_from_post
+from utils import get_summary_from_post
 from utils import delete_cached_html
 from utils import get_account_timezone
 from utils import domain_permitted
@@ -636,7 +638,14 @@ def save_post_to_inbox_queue(base_dir: str, http_prefix: str,
             content_str = \
                 get_base_content_from_post(post_json_object, system_language)
             if content_str:
-                if is_filtered(base_dir, nickname, domain, content_str):
+                summary_str = \
+                    get_summary_from_post(post_json_object,
+                                          system_language, [])
+                media_descriptions = \
+                    get_media_descriptions_from_post(post_json_object)
+                content_all = \
+                    summary_str + ' ' + content_str + ' ' + media_descriptions
+                if is_filtered(base_dir, nickname, domain, content_all):
                     if debug:
                         print('WARN: post was filtered out due to content')
                     return None
@@ -2683,7 +2692,11 @@ def _valid_post_content(base_dir: str, nickname: str, domain: str,
         return False
 
     # check for filtered content
-    if is_filtered(base_dir, nickname, domain, content_str):
+    media_descriptions = get_media_descriptions_from_post(message_json)
+    content_all = content_str
+    if summary:
+        content_all = summary + ' ' + content_str + ' ' + media_descriptions
+    if is_filtered(base_dir, nickname, domain, content_all):
         print('REJECT: content filtered')
         return False
     if message_json['object'].get('inReplyTo'):
diff --git a/posts.py b/posts.py
index c93244d6c..733a34c8b 100644
--- a/posts.py
+++ b/posts.py
@@ -32,6 +32,7 @@ from webfinger import webfinger_handle
 from httpsig import create_signed_header
 from siteactive import site_is_active
 from languages import understood_post_language
+from utils import get_media_descriptions_from_post
 from utils import valid_hash_tag
 from utils import get_audio_extensions
 from utils import get_summary_from_post
@@ -5002,8 +5003,15 @@ def download_announce(session, base_dir: str, http_prefix: str,
                              base_dir, nickname, domain, post_id,
                              recent_posts_cache)
             return None
-
-        if is_filtered(base_dir, nickname, domain, content_str):
+        summary_str = \
+            get_summary_from_post(announced_json, system_language, [])
+        media_descriptions = \
+            get_media_descriptions_from_post(announced_json)
+        content_all = content_str
+        if summary_str:
+            content_all = \
+                summary_str + ' ' + content_str + ' ' + media_descriptions
+        if is_filtered(base_dir, nickname, domain, content_all):
             print('WARN: announced post has been filtered ' +
                   str(announced_json))
             _reject_announce(announce_filename,
diff --git a/utils.py b/utils.py
index e9e985d13..b741cb520 100644
--- a/utils.py
+++ b/utils.py
@@ -138,6 +138,25 @@ def get_content_from_post(post_json_object: {}, system_language: str,
     return content
 
 
+def get_media_descriptions_from_post(post_json_object: {}) -> str:
+    """Returns all attached media descriptions as a single text.
+    This is used for filtering
+    """
+    this_post_json = post_json_object
+    if has_object_dict(post_json_object):
+        this_post_json = post_json_object['object']
+    if not this_post_json.get('attachment'):
+        return ''
+    descriptions = ''
+    for attach in this_post_json['attachment']:
+        if not attach.get('name'):
+            continue
+        descriptions += attach['name'] + ' '
+        if attach.get('url'):
+            descriptions += attach['url'] + ' '
+    return descriptions.strip()
+
+
 def get_summary_from_post(post_json_object: {}, system_language: str,
                           languages_understood: []) -> str:
     """Returns the summary from the post in the given language