In my 10+ years of experience, about 95% of the ActiveCampaign accounts I’ve worked on are either underutilised or hands-down chaotic. More often than not, a bloated, dirty list is where that mess starts.
Cleaning an email list is a two-part job: one manual pass to strip out the addresses that can’t or won’t engage, then an automation that keeps it clean so you rarely touch it again.
You’ve been building this list for a while, and the total keeps climbing. Maybe you maintain a newsletter, or maybe you just switched it on and hit a 10% bounce rate. At those rates your provider blocks you or treats your domain as a spammer, and you lose your only line to most of these leads, sometimes your best customers among them. The tools sell cleaning as one click. That’s a third of what actually protects your deliverability. Below is the whole process including ActiveCampaign-specific tips and when you shouldn’t clean at all.
What email scrubbing actually means (remove, re-engage, suppress)
Three jobs hide inside that phrase. The industry calls it email scrubbing.
- Removing clears addresses that were never real or no longer work: fakes, typos, hard bounces.
- Re-engaging wins back real people who went quiet before you cut them.
- Suppressing keeps an address out of future sends without deleting the record, so you never mail it again by accident.
This guide covers all three. You’re essentially treating it as three lists that you want to untangle. Email marketing is essentially list management.
This guide covers all three. You’re essentially treating it as three lists that you want to untangle. Email marketing is essentially list management.
List hygiene protects your deliverability in the short and long term
Your provider watches how people react to your sends. Low opens, spam complaints, and dead addresses all say the same thing: this sender isn’t wanted. Push it far enough and your domain reputation drops, so even your emails to good addresses land in spam.
Having good list hygiene prevents that.
I saw it with a client sitting on 16,000 contacts collected over years, never emailed once, mostly un-opted-in, footer-form bots, and one-time buyers. Disappointingly few quality signups. The first email they sent to the whole list was opened by only 3.2% against the 20%+ they expected, and the domain reputation fell from HIGH to LOW instantly in Google Postmaster Tools, taking 3 months to recover. The list said 16,000 but in practice it was only around 2,000 eligible emails. Removing the 14,000 trash emails helps deliverability, because the dead weight drags down the signals the platforms use to judge the quality of the account.
How I clean an email list in Activecampaign: My step-by-step process I never skip
Do this once, by hand. The automation comes after.
Step 1: Export
- Go to “Contacts” and export them all. Or – if you have it ready – just export the segment that needs cleaning.
- The export runs in the background. You don’t sit and wait for it. Kick it off, then go do something else and grab the file from Contacts > Exports. The download link stays live for 7 days.
- Save the raw export untouched as a second file. There’s no undo on an import.
- Before you export, look at the status breakdown: Active, Unconfirmed, Unsubscribed, Bounced. The Unconfirmed pile is the one nobody thinks about – people who submitted a double opt-in form and never clicked the link. They’ve been sitting there for months doing nothing.
Step 2: Cut the obvious fakes
- Emails with domains from countries you don’t have an audience in (eg. “.ru”)
- Emails with lots of numbers in them
- Emails with too many characters
- Emails with too many dots
- Emails with random characters that don’t mean anything
- Emails from specific domains that show up way too much
- Contacts that have seemingly legit emails but their full name is gibberish, or have same first & last name (I’ve found this happening a lot lately)
- Emails with typos: gmial.com, gmai.com, hotmial.com, yaho.com. Find and replace, don’t delete. Those are real subscribers.
- Cross-check your bounce reports before you delete anything by eye. AC marks a contact Bounced immediately on a hard bounce, and after three soft bounces in a row across three separate campaigns. The per-campaign bounce report gives you the date, the bounce code, the type and the description, so you can see whether one domain is the problem or it’s spread everywhere. Activecampaign now has a “email bounced” trigger, so you can do stuff with this.
- Sometimes you’ll have to suppress role addresses as well: info@, sales@, support@, contact@, no-reply@. Complaint risk, rarely a real person.
- If you got hit by bot signups, find the form they came through and put a Captcha on it. Otherwise you’re cleaning the same mess again in three months.
Step 3: Verify only the doubtful ones
- Define “engaged” before you segment. 90 days if you send weekly, 12 months if you send quarterly. Pick the number and write it down.
- Before you judge engagement, turn off the Apple Privacy filter in your reports. AC includes Apple MPP opens in open reporting by default, and MPP opens every email whether the person looked at it or not. Uncheck the filter and you see verified opens only. There’s no way to segment MPP openers in Advanced Search, so don’t go looking for one.
- Build the engaged segment on clicks, site visits and purchases. Opens will keep half your dead list looking alive.
Step 4: Standardize the data
- Dates: YYYY-MM-DD, dashes only. Get it wrong and AC files the value as a date in 1899.
- Phone numbers: E.164 format (+30…) or they don’t validate.
- Multi-select fields: separate the values with ||. No space needed, AC adds it.
- No emojis anywhere in the file. One emoji in one cell and the whole import gets stuck.
- No line breaks inside cells. Not supported.
- On the import screen there’s an advanced option called “Create field options when importing new custom field values.” Understand both sides before you touch it. Turn it on and any value that doesn’t match an existing dropdown option gets created as a new one. Turn it off and values that don’t match exactly aren’t imported at all. This is the mechanism that produced the “company / company name / business name” situation in the first place.
- Map to your existing fields manually. Let the importer create fields for you and you rebuild the same mess.
Step 5: Re-upload, then cut the rest
- Open Advanced Options and turn off Trigger Automations before you hit import. Leave it on and your contacts enter every automation triggered by the list you’re adding them to, the tags you’re applying, or any field you’re importing. That’s how people accidentally send their welcome series to 86,000 people.
- Apply your tag during the import, not after. One less bulk action.
- Prefix the tag with the date (cleanup_2026_07) so it groups in the tag dropdown, which turns into a swamp fast.
- Know this before you plan the cut: anyone who previously unsubscribed from a list will not be re-imported to a list by CSV, even with “update existing contacts” checked. Part of your clean file won’t land where you expect.
- Send one win-back email before you cut. One. ActiveCampaign’s own guidance is that more win-back emails erode your sender reputation faster than the dead weight does.
- Unsubscribing is not deleting. To actually remove contacts you archive them first, then delete from the archived list. Archiving has a monthly limit that resets on your billing date, a 30-day freeze before you can restore anyone, and a 1-year retention window before the data is gone. Also, if an archived contact submits an active form, they come back automatically.
- Check the account creation date before you promise anyone a cheaper bill. Accounts created on or after 3 November 2025 are charged for every contact regardless of status, including unsubscribed, bounced and unconfirmed. Accounts created on or before 2 November 2025 still pay for active contacts only. On a newer account, unsubscribing half the list saves nothing until you archive.
How to handle unengaged subscribers before you delete them
Cutting quiet subscribers outright throws away people who might still buy. Missing one, two, or three emails doesn’t mean they won’t open a good one later. A sunset flow gives these unengaged subscribers one last chance first.
What a sunset policy is and when it triggers
A sunset policy is the rule: a subscriber only comes off after a set quiet period and a final sequence, not the moment they go silent.
Trigger the automation three to six months after a contact’s last engagement, then send two emails in a week. The first admits it’s been a while and pairs it with an offer good enough to pull them back. The second warns you’re removing them in 48 hours. The subject line does almost all the work in both, because if they don’t open, nothing inside matters. Anyone who opens either stays; everyone else comes off 48 hours after the second send.
Email suppression list management: suppress, don’t just delete
When a contact fails the sunset flow, hard-bounces, or marks you as spam, don’t delete the record. Suppress it. A suppression list is the set of addresses your platform is blocked from mailing again, even after a re-import.
Deleting only removes the record for now; the address walks back in through the next import or form fill, and you mail a known complainer again. The management side is keeping that list in sync across every tool that can send for you, so “removed” means removed everywhere.
Deleting only removes the record for now; the address walks back in through the next import or form fill, and you mail a known complainer again. The management side is keeping that list in sync across every tool that can send for you, so “removed” means removed everywhere.
Automate it so you rarely clean by hand again
Once the manual pass is done, two automations keep the list clean. The first catches fakes at the door: as each contact enters, check for known-bad domains, an odd character count, or the classic .con typo, and filter them out before they join. The second is the sunset flow above, running continuously off each contact’s last-engagement date.
Pro Tip: It’s worth catching some of those mistakes at the form level, or however you obtain new emails.
How often should you clean an email list?
That leaves one manual job. Every six months, open the list and spot-check it by hand. That is how often to clean an email list once the automations carry the weight. Send often with strong engagement and you can stretch it; a cold list needs it sooner.
When NOT to clean your list
Cleaning isn’t always the answer. If you already mail consistently with healthy engagement, don’t scrub, you’ll remove almost nothing. If a segment looks inactive but you never gave it a reason to open, fix your sending first, and if you already know who’s engaged, verify only the part that’s in doubt.
The number that actually matters
The list you never clean is already smaller than the figure in your dashboard. What you’re really counting is how many people can (and want) still hear you, and cleaning your email list is how you find out.
If you’d rather have this built and automated for you, send me a message. I’ve already done it multiple times. Here’s how I work with clients.
