Spam filter
Also called: reddit filters, removed by reddit's filters, reddit spam filter, potential spam
Definition
Reddit's spam filter is the automated system that removes or hides posts and comments it judges likely to be spam, often from new or low-karma accounts. Filtered content can be restored by a subreddit's moderators, and mods' spam markings help train it.
If you have seen "Sorry, this post has been removed by Reddit's filters," it means an automated system, not a person, removed your post. The filter is Reddit's, but the content sits in a subreddit, so that subreddit's moderators can still approve it.
How it works
Reddit runs several automated layers that people lump together as "the spam filter":
- The sitewide spam filter. Reddit's help center says there is "a limit to how often users can post and comment in a community," and that brand-new users without much karma, or users new to a community "especially sensitive to spammers," may hit this filter. Its advice: even a small amount of karma earned by commenting in that community can help you get past it.
- Potential Spam collapsing. Reddit auto-collapses comments it detects as likely spam or low quality. Mods see them labeled "Potential Spam" and can approve them to uncollapse.
- Filters mods switch on. AutoModerator, the reputation filter, crowd control and the ban evasion filter. These are the community's settings, built on Reddit's signals.
What the spam filter catches goes to the subreddit's Removed queue. When a mod marks something as spam rather than just removing it, Reddit says the filter "will take notice of this and slowly try to learn from spammed items."
Why it matters for marketers
The spam filter is weighted against exactly the accounts businesses tend to use: new, low-karma, posting links, often in many communities at once. It also often removes content silently, so you may not know.
Reddit's own guidance on avoiding the spammer label is the best summary: post authentic content in communities you have a personal interest in, and if your contributions are mostly links to a business you run, "be thoughtful about the frequency of posting." See why Reddit posts get removed for the full checklist.
Example
A founder creates an account, joins five subreddits, and posts a launch announcement with a link in each within an hour. All five show "removed by Reddit's filters." No mod was involved. The account has no karma, the link domain is new, and the pattern is repetitive.
Common mistakes
- Deleting and reposting the same content. That repeats the pattern the filter is built to catch.
- Assuming a filter removal is a shadowban. One removed post is a shadow removal; a shadowban hides the whole account.
- Buying Reddit Premium to get around it. Reddit says Premium "won't affect the spam filter."
Frequently asked questions
What does "removed by Reddit's filters" mean?
An automated Reddit system removed your post as likely spam, often because the account is new, has little karma, or posted a link in a way that looks repetitive. The subreddit's moderators can review and approve it.
How do I get past the Reddit spam filter?
Reddit's help center suggests earning a small amount of karma by commenting in the community first. Avoid repeating links, and message the mods via modmail if you think your post was removed by mistake.
Can moderators restore a post removed by the spam filter?
Yes. Spam-filtered content goes to the community's removed queue, and a moderator can approve it to make it visible again.