Your Reddit post disappeared and you got no notification. You are not alone. Reddit's multi-layered spam detection system catches thousands of legitimate posts every day. This guide explains exactly how it works and how to avoid being caught.
3 filter layers
Reddit uses a site-wide ML filter, per-subreddit AutoMod bots, and human moderator review. Each layer operates independently.
Silent removal
The site-wide filter removes posts without any notification. Your post looks normal to you but is invisible to everyone else.
30-day threshold
Accounts under 30 days old face dramatically higher filtering rates, especially for link submissions.
Every piece of content you post on Reddit passes through up to three separate filtering systems. Understanding each one is the key to consistently getting your posts through.
Runs on every post and comment before they appear publicly
Evaluates account age, karma, posting patterns, domain reputation, and IP address
Cannot be modified by subreddit moderators
Removed content does not generate a notification to the author
Uses machine learning models trained on billions of data points from known spam accounts
Custom rules written by each subreddit's mod team using YAML configuration
Can filter based on account age, karma thresholds, specific keywords, domains, flair, and more
Rules vary wildly between subreddits. What passes in one community may be auto-removed in another
Some subreddits publish their AutoMod rules. Most keep them private to prevent gaming
Can be configured to remove, flag for review, or auto-approve based on conditions
Content flagged by either filter goes into a mod queue for human review
Moderators check your profile, post history, and the context of your submission
Human review is where your post history and community reputation matter most
Moderator decisions are final within their subreddit. There is no appeal to Reddit admins for subreddit-level removals
Active subreddits may review flagged content within minutes. Smaller ones can take days
These are the specific signals that cause Reddit's spam filter to flag or remove your content. Each trigger is ranked by severity based on how aggressively the filter responds.
Link velocity
Posting links to the same domain more than 2 to 3 times within 24 hours across different subreddits. The filter tracks how frequently you share the same URL or domain.
Account age under 7 days
Brand new accounts that post links are automatically held for review in most subreddits. Some communities require 30+ day old accounts before any links are allowed.
Low karma with link posts
Accounts with less than 10 combined karma that submit link posts are flagged by default. The threshold varies by subreddit but low karma plus link posts is always suspicious.
Keyword patterns
Certain phrases commonly used in spam trigger automatic filtering. Words like "check out my," "use code," "limited time offer," and "click here" are heavily monitored.
URL shorteners
Links through bit.ly, t.co, tinyurl, and similar URL shorteners are almost always caught by spam filters. Reddit prefers direct links where the destination is visible.
Identical or near-identical text
Posting the same text across multiple subreddits within a short window triggers crosspost spam detection. Even minor variations (changing a word or two) are caught by text similarity algorithms.
Rapidly deleted and reposted content
Deleting a post and immediately resubmitting it is a red flag. This pattern is associated with spammers testing which version avoids detection.
VPN or proxy IP addresses
Many VPN IP ranges are on shared blacklists due to previous spam activity. Posting from these IPs increases the likelihood of triggering spam filters.
Reddit has three different types of content removal. Each works differently, comes from a different source, and requires a different response. Knowing which one hit you is the first step to fixing it.
Your post appears normally when you are logged in, but other users cannot see it. You receive no notification. This is the most common outcome from the site-wide spam filter.
How to detect
Log out and navigate to the subreddit. If your post is not visible in the listing, it was shadow removed. You can also check by opening your post URL in an incognito browser window.
Your post is visibly marked as removed. You may see "[removed]" in place of your content. Other users see this too. This typically comes from moderator action or AutoMod.
How to detect
You will usually receive a moderator message or see the "[removed]" tag on your post. Some subreddits send automated messages explaining the removal reason.
Your entire account is shadow-hidden. Every post and comment you make across all subreddits is invisible to everyone except you. This is a site-wide admin action.
How to detect
Check your profile while logged out. If you see "page not found" or "this user has been suspended," you are shadowbanned. Use a tool like the MediaFast shadowban detector to verify.
Work through these steps in order to diagnose exactly what happened to your post and determine the right course of action.
Yes
Your post is live. No issue.
No
Your post was shadow removed. Continue to step 2.
Yes
You are not shadowbanned. The removal is post-specific. Continue to step 3.
No
You may be shadowbanned. Go to reddit.com/appeals to submit an appeal.
Yes
You likely do not meet the threshold. Build more karma in other subreddits first.
No
Continue to step 4.
Yes
The domain may be on a blacklist or the spam filter flagged the link. Try posting as a text post without the link to test.
No
Continue to step 5.
Yes
You triggered crosspost spam detection. Wait 24 to 48 hours and vary your content significantly before reposting.
No
Message the subreddit moderators to ask why your post was removed. It may be caught in a custom AutoMod rule.
Legitimate content gets caught by spam filters more often than most people realize. Here are the most common false positive scenarios and the specific fix for each one.
You shared a legitimate article from a new or lesser-known domain
Post the article as a text post with a brief summary and include the link in the body. Text posts face less scrutiny than direct link submissions.
You commented on your own post and the comment was removed
Comments with links on your own link posts sometimes trigger double-promotion detection. Remove the link from the comment and reference the post itself instead.
Your account is old but you recently started posting after a long break
Dormant accounts that suddenly become active trigger reactivation checks. Spend 3 to 5 days commenting before making any submissions.
You posted a product recommendation that matched spam patterns
Avoid phrases like "check this out" or "I found this amazing tool." Instead, describe the specific problem you solved and naturally mention the solution.
You are posting from a shared office or university network
Shared IP addresses may be flagged if other users on the same network have been marked as spam. Contact Reddit support at reddit.com/appeals if this persists.
The best long-term strategy is to build enough trust that your content bypasses aggressive filtering entirely. Here is how to work toward that.
Build a clean post history
Spend at least 30 days building genuine karma through comments and non-promotional posts. This establishes your account as trustworthy to both filters and moderators.
Become a recognized community member
In subreddits where you want to share links regularly, establish yourself as a helpful contributor first. Some mods maintain "approved submitter" lists for trusted users. Tools like <a>MediaFast</a> can help you identify the right subreddits to build presence in.
Contact moderators proactively
Before sharing your content, message the moderators explaining who you are and what you would like to share. Many mods appreciate the courtesy and will pre-approve your submissions.
Apply for "approved submitter" status
Some subreddits have a formal process for approving submitters whose content consistently passes quality checks. This status bypasses most AutoMod filters in that subreddit.
Report false positives consistently
If your legitimate posts are being filtered, use the "message the moderators" link in the subreddit sidebar. Politely explain the situation. Most mods will manually approve good content and adjust their filters.
MediaFast helps you maintain clean posting patterns that spam filters trust.
Common questions about Reddit spam detection, AutoMod, and how to get your posts through.
The most reliable method is to check your post while logged out or in an incognito browser window. If the post is visible when you are logged in but invisible when logged out, it was caught by a spam filter. Reddit does not send a notification when the site-wide filter removes your post. Only AutoMod or human moderators sometimes send removal messages.
AutoMod is a bot configured by individual subreddit moderators using custom YAML rules. It only operates in subreddits where it has been set up, and its rules vary by community. The site-wide spam filter is operated by Reddit itself, runs on every post across all subreddits, and uses machine learning to detect spam patterns. You cannot see or influence the site-wide filter rules.
It is extremely difficult. If your domain is on a site-wide blacklist, you need to contact Reddit admins directly through reddit.com/appeals or by sending a message to r/reddit.com. You will need to demonstrate that your domain is legitimate and that the spam activity has stopped. The process can take weeks or months and there is no guarantee of success.
Account age is only one factor. The spam filter also evaluates your recent posting patterns, link-to-comment ratio, domain reputation, and the specific subreddit settings. An old account that suddenly starts posting links after months of inactivity will face the same scrutiny as a newer account.
Yes. Paid Reddit ads go through a separate advertising system with its own review process. They are not subject to the community spam filter, AutoMod rules, or subreddit moderator approval. This is one reason some businesses use Reddit ads for initial visibility while building organic presence.
There is no fixed timeline, but most spam filter restrictions ease significantly after your account is 30 days old and has accumulated 50+ karma. Some subreddits set higher thresholds. The safest approach is to spend your first month exclusively commenting and building karma before attempting any link posts.