# DM Your Existing Commenters — run automation on past comments > Reachlee's Retrigger runs your Instagram automation on a post's existing comments — auto-deduped, paced to stay safe. Reaches commenters from the past 7 days. Use case · Retrigger past comments # Your post already has the comments. Now send them the DM. Retrigger scans a post's existing comments and runs your automation on them — the people who commented before you set the automation up, or before you found Reachlee at all. Deduped automatically, paced to stay Instagram-safe, done in one click. Updated August 2026 · Human-verified [Start free ](/app/) Built on Meta's official Instagram API · Meta-verified Tech Provider · Pro feature, $9/mo 1Retrigger runs your Instagram automation on comments that already exist on a post — so people who commented before your automation was live still get the DM. 2It reaches commenters from the past 7 days (that's Instagram's rule for every tool, not ours), skips anyone already replied to, and paces every send so a backfill never looks like a bot burst. 3One click on any live automation: pick Re-run, confirm the post, watch it work through the backlog. Re-run any time — already-handled commenters are skipped automatically. ## What does it mean to retrigger an old post? Normal comment-to-DM automation only fires on new comments — the ones that arrive after you hit publish on the automation. But most creators set up automation after a post starts working. The Reel took off Tuesday, you found Reachlee Thursday, and now there are 300 comments saying "LINK" that your automation never saw. Retrigger fixes that. It scans the post's existing comment history, finds every comment that matches your automation's keyword, and runs the same automation on each one — same DM, same tracked link, same lead capture — as if the comment had just come in. It's the difference between "automation from now on" and "automation for the comments you already earned." One honest boundary you should know upfront: Instagram only allows a private reply to a comment made within the last 7 days, so Retrigger works through the past week of comments. The post itself can be months old — it's the comments it processes that need to be recent. More on that in the FAQ below. * Trigger: you click Re-run on a live automation and confirm the post you want to backfill. * Action: Reachlee scans the existing comments, matches them against your keyword, and sends each eligible commenter the automation's DM — spaced out, never in a burst. * Result: the commenters you missed get the exact same experience as everyone who comments from now on. No copy-pasting, no manually working down a comment thread at midnight. How it works ## One click, then it runs itself. 01 ### Open a live automation Retrigger belongs to an automation, not a separate tool. Open any live comment automation in your Reachlee dashboard — the one whose DM, keyword, and link you want existing commenters to get. Whatever that automation sends (link, product carousel, lead capture), the retrigger run sends the same thing. 02 ### Pick Re-run and confirm the post Choose Re-run on the automation, confirm the post or Reel you want to backfill, and start the run. Reachlee scans that post's existing comments, matches them against your keyword, and builds the send queue. Anyone your account has already privately replied to is excluded before a single DM goes out. 03 ### Watch it pace through the backlog The run starts immediately and you can watch its progress live — how many comments matched, how many DMs sent, how many skipped. Sends are automatically spread out with delays and hourly and daily caps, and live comment traffic always jumps the queue. Then it finishes on its own. Close the tab; it doesn't need you. What's inside ## A backfill that behaves. Retrigger is built to catch you up without ever putting your account at risk — dedupe, pacing, and priority rules are all automatic. 01 ### Existing-comment scan Retrigger reads the post's actual comment history through Meta's official API — no scraping, no browser bots. It matches each existing comment against your automation's keyword exactly the way live automation does, so the same people who would have triggered it in real time get picked up after the fact. 02 ### Auto-dedupe, built in Instagram allows exactly one private reply per comment, ever. Reachlee tracks every comment your account has already replied to — by a live automation, a previous retrigger, or you manually — and excludes them from the run automatically. Nobody gets the same DM twice. You can't misconfigure this; it's not a setting. 03 ### Automatic pacing A 300-comment backfill sent in one minute looks like a bot to Instagram. Retrigger spreads sends out with delays between each DM and caps volume per hour and per day. You never set a throttle or guess a safe speed — the pacing is enforced for you, on every run, no matter how big the backlog. 04 ### Live traffic goes first If someone comments on your post while a retrigger run is in progress, their DM goes out immediately — live automations always take priority over the backfill queue. New commenters get the instant response they expect; the retrigger quietly fills the gaps in between. You never trade real-time speed for catch-up volume. 05 ### Works with any DM type Retrigger sends whatever the automation sends. Link DM with click tracking, a swipeable product carousel, a lead-capture flow that asks for an email — if the automation does it for new commenters, the retrigger run does it for past ones. Same message, same buttons, same analytics. 06 ### Re-run any time A post that keeps collecting comments can be retriggered again next week — and the week after. Every run skips already-handled commenters automatically, so re-running is always safe. Some creators treat it like a weekly sweep: let comments pile up on an evergreen post, re-run, repeat. Real scenarios ## The three moments Retrigger was built for. ### You set up automation after the post took off Before Your Reel went semi-viral on Monday. You found Reachlee on Thursday and set up a "LINK" automation — but the 250 people who commented Monday through Wednesday get nothing. Your best-ever post, and the most interested people missed the DM. With Reachlee You hit Re-run right after publishing the automation. Reachlee works through the past week of comments, DMs every "LINK" commenter your tracked link at a safe pace, and new commenters keep getting instant replies the whole time. The post's momentum isn't wasted — it's captured. ### You just switched from another tool Before You moved from your old automation tool to Reachlee, and there's a gap: comments that landed between cancelling one and setting up the other went unanswered. Those are warm, keyword-typing, hand-raising people — sitting in a comment thread. With Reachlee Rebuild the automation in Reachlee, hit Re-run on the posts that collected comments during the switch, and the gap closes itself. Anyone your old tool already privately replied to is excluded automatically — Instagram's one-reply-per-comment rule means dedupe works across tools, not just within Reachlee. ### An old post that keeps collecting comments Before A tutorial you posted in March still gets 10–20 "how do I get this?" comments a week from search and Explore. You answer some manually, forget others, and the post quietly leaks leads every single day. With Reachlee Put a live automation on the post so new comments get instant DMs, and run Retrigger once to sweep up the past week you missed. From then on the automation handles everything in real time — and if you ever pause it, one re-run catches you back up. Pricing ## Retrigger is a Pro feature. Pro is $9/mo. Comment-to-DM automation itself is free — 1 Instagram account, 1,000 DMs/month, no credit card. Retrigger comes with Pro at $9/mo, alongside 3 Instagram accounts, unlimited DMs, any-post triggers, Growth Gate, and lifetime analytics. If you have a post with a week of unanswered keyword comments sitting on it, one retrigger run usually pays for the month. [Start free ](/app/) FAQ ## Retriggering past comments, answered honestly. How far back can Retrigger go? Seven days. Instagram only allows a private reply to a comment made within the last 7 days — that's Meta's platform rule, and it applies to every automation tool, not just Reachlee. So Retrigger reaches commenters from the past week. The post can be months or years old; it's the comments being processed that must be recent. In practice this covers the real use cases well: you just set up an automation and want the comments you missed this week, a post is still collecting comments daily, or you switched tools and need to close the gap. Any tool claiming it can DM commenters from months ago is either wrong or breaking Meta's rules. Will it double-message people? No. Instagram allows exactly one private reply per comment, ever — and Reachlee builds on that with automatic dedupe. Before a retrigger run sends anything, every comment your account has already privately replied to is excluded: replies from a live automation, from a previous retrigger run, from a different tool you used before, or ones you sent manually. This isn't a setting you can get wrong; it's enforced on every run. Re-running the same post twice is completely safe — the second run simply skips everyone the first run handled and only picks up genuinely new commenters. Will a big backfill get my account flagged? This is exactly what the automatic pacing is for. Retrigger never sends the backlog in a burst — every DM is spaced out with delays, and total volume is capped per hour and per day. To Instagram, a paced retrigger run looks like a normal account replying to its comments over time, not a bot dumping 300 messages in a minute. Reachlee is also built entirely on Meta's official Instagram API as a Meta-verified Tech Provider — no scraping, no browser automation — and it respects Instagram's rate-limit signals, backing off whenever the API asks. You don't configure any of this; safe pacing is the only mode Retrigger has. Can I use Retrigger with a product carousel? Yes. Retrigger runs whatever the automation is set up to send. If your automation sends a swipeable product carousel, past commenters get the carousel. If it sends a tracked link, a button, or a lead-capture flow that asks for their email, they get exactly that. There's no separate "retrigger message" to write — the whole point is that people who commented before the automation existed get the identical experience to people who comment after. Clicks and captured leads from a retrigger run land in the same analytics as your live automation, so you can see what the backfill actually converted. What happens to comments older than 7 days? Honestly: they can't receive a private reply — from Reachlee or any other tool. Instagram's API refuses private replies to comments older than 7 days, full stop, and there's no compliant workaround. What you can do: leave a public comment reply on the post pointing people to comment again or check your bio link, and make sure the automation is live going forward so no future comment is ever missed. Older commenters who come back and comment again are caught instantly by the live automation. It stings to lose the old ones, but a tool that promised otherwise would be lying to you or risking your account. Do I need to keep Reachlee open while a run finishes? No. Once you start a retrigger run, it executes on Reachlee's servers, not in your browser. You can watch the progress live if you want — comments matched, DMs sent, commenters skipped — but closing the tab changes nothing. The run keeps pacing through the backlog and finishes on its own, whether that takes twenty minutes or, for a big post with daily caps in play, spills into the next day. Come back later and the run summary is waiting for you. If new comments arrive while it's running, the live automation answers those instantly; the retrigger just keeps working through the older queue in the background. Is Retrigger available on the free plan? No — Retrigger is a Pro feature, and Pro is $9/mo. The free plan includes real comment-to-DM automation (1 Instagram account, 1,000 DMs per month), so you can set up live automations and try Reachlee without a card. Pro adds Retrigger plus 3 Instagram accounts, unlimited DMs, any-post triggers, Growth Gate, scheduled messages, and lifetime analytics. The typical upgrade moment is exactly the one this page describes: a post takes off before your automation exists, and you want the week of comments you missed. One backfill on a good post usually recovers more leads than the $9 costs. Keep exploring ## Related Instagram automation use cases. [Instagram DM automation guideThe complete guide this use case is part of.](/instagram-dm-automation/)[Comment to DM automationThe core pattern — auto-DM every new keyword comment, from now on.](/use-cases/comment-to-dm/)[Auto-DM Reels commentsThe Reels-specific playbook — viral spikes, non-followers, old Reels.](/use-cases/auto-dm-reels-comments/)[Automatic DM follow-upsOne polite reminder if they never reply or tap — cancels itself if they do.](/use-cases/dm-follow-up/)[Sell products in DMsOne comment sends a swipeable carousel of up to 10 products.](/use-cases/product-carousel-dm/)[Reachlee for creatorsBuilt for solo creators monetising on Instagram.](/for/creators/)[Reachlee vs ManychatWhy creators pick Reachlee over Manychat's per-contact pricing.](/vs/manychat/) --- Source: https://www.reachlee.co/use-cases/retrigger-old-posts