subreddit = reddit.subreddit('all')
comments = subreddit.stream.comments()
for items in reddit.inbox.stream():
    if message.author.name not in posts_repli_to:
        if 'block' in message.body:
            posts_repli_to.append(message.author.name)
    if comment.author.name not in posts_repli_to:
        if 'block' in comment.body:
            posts_repli_to.append(comment.author.name)