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What is an AutoMod filter on Reddit? An AutoMod filter is one of the individual rules a subreddit’s mod team configures inside AutoMod, Reddit’s automated moderation bot. Each filter defines a condition that content has to fail (or pass) for AutoMod to act on it — remove it, report it, or approve it before human mods look. Every serious subreddit runs a full stack of these filters, and they’re what actually decide whether your post reaches the community or gets silently removed the moment you hit submit.

Operators running Reddit automation tend to think about AutoMod as one thing — a single filter that either lets content through or blocks it. It’s not. It’s a rule engine with dozens of individual filters configured per-subreddit, each checking a different condition. Your post can pass 20 filters and fail one, and that one failure is enough to remove the post.

What filters check

The most common AutoMod filter categories:

Account age. Filters that require the poster’s account to be older than a threshold. r/AskReddit wants a few days minimum. r/pcgaming wants 90 days. Some serious subs want a year. Fresh accounts fail these instantly.

Karma thresholds. Separate filters for comment karma and post karma. r/entrepreneur requires comment karma above a minimum. r/videos requires post karma. Zero-karma or near-zero accounts get filtered on almost every established sub.

Domain filters. Blocklist of URLs that trigger automatic removal. Most subs blocklist obvious spam domains, adult content links, and affiliate URL patterns. Some blocklist entire link shorteners (bit.ly, tinyurl) regardless of what the shortened link points at.

Keyword filters. Words or phrases in the title or body that trigger removal. Spam-associated language, sub-specific banned terms, competitor mentions in product-focused subs.

Format filters. Rules requiring specific title formats, minimum character counts, mandatory flair, or specific post types (only self-posts, only link posts, no image posts).

User behavior filters. Rules that check whether the poster has been active in the sub before, whether they’ve been warned, whether their username matches suspicious patterns.

Each sub combines these categories into its own filter stack. What passes r/marketing might fail r/entrepreneur. What passes r/socialmedia might fail r/marketingautomation. There’s no single set of rules that works across Reddit.

How filters remove content silently

The design decision that makes AutoMod filters so hard for operators to diagnose is that they don’t notify anyone. When a filter fires:

This is deliberate. If AutoMod told spammers exactly which filter triggered, spammers would tune around it. Silent removal keeps filter logic opaque.

The operational cost for legitimate operators is that you have no visibility into which of your posts got removed unless you check. Most operators don’t check, so they never realize that half their posting output is invisible to the audience they’re trying to reach.

How to check if a filter caught your post

Two reliable methods:

Incognito window check. Log out of Reddit (or open the sub in a private browsing window). Look at the sub’s feed. If your post’s missing from the incognito view, an AutoMod filter removed it. Logged-in as the poster, you see your own removed posts because Reddit shows you your content. Logged out, you see what everyone else sees.

Removed-content tools. Third-party sites like reveddit.com and removeddit.com pull Reddit’s cache and show removed posts and comments. Search your username and you’ll see the gap between what you posted and what stayed live. Most operators are surprised by that gap the first time they check.

What to do when filters hit you

The specific fix depends on which filter caught you. Common paths:

If karma filters caught you: warm up the account with comments in low-filter subs (r/AskReddit, casual hobby subs) until karma clears the threshold. This takes 2-4 weeks minimum for most serious subs.

If domain filters caught you: stop linking that domain. Move promotional content to comments if the sub allows it, or link to a different domain that passes the filter.

If format filters caught you: read the sub’s sidebar rules and match the required format. Character minimums, flair requirements, and title structure are usually documented.

If keyword filters caught you: paraphrase the trigger words. Filters check exact strings or regex patterns; small wording changes bypass most of them.

For any of these, message the mods asking why your post was removed. Some mod teams respond with the specific filter that fired. Most don’t, but it costs nothing to ask.

Why this matters for automation

Reddit automation strategies that don’t account for AutoMod filters generate posting metrics on the operator’s side and near-zero engagement on the audience side. It’s not that the posts underperformed — it’s that they never appeared. Every post you publish needs to clear the sub’s filter stack, and every sub’s stack is different. Operators who warm up accounts properly, read sub rules, and verify visibility from logged-out views get through the filter layer. Operators who don’t get their content silently removed and don’t understand why their Reddit strategy isn’t working.

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