# Clean an Email List in Klaviyo: Suppress and Verify

URL: https://email-validation.org/guides/clean-email-list-klaviyo/
Updated: 2026-11-06

> Documentation index: https://email-validation.org/llms.txt

To clean a Klaviyo list, let Klaviyo's own suppression handle what has already bounced, then verify the profiles it
still mails and suppress the ones whose result says `remove`. Klaviyo suppresses hard bounces and repeated soft
bounces automatically, and a spam complaint stops email marketing to that person. What it cannot do is find dead
addresses before you send to them. The workflow is: export the profiles that can still receive email, verify
the file, bring the results back as custom profile properties, suppress the bad ones, and keep engagement cleaning
(the sunset flow) as a separate step.

## What Klaviyo already does on its own

Klaviyo's help article [Understanding suppressed email profiles](https://help.klaviyo.com/hc/en-us/articles/115005246108)
lists the reasons a profile ends up suppressed: a hard bounce, seven consecutive soft bounces, a spam complaint, a
manual suppression (shown as "User suppressed"), and a suppression carried over from a previous email service
provider. Suppressed profiles are skipped in marketing sends even if you try to include them, and they do not count
toward your email plan's active profile limit. Klaviyo also skips addresses it considers suspicious from hard
bounce history across all of Klaviyo, even if they never bounced in your account.

### Bounces

Per [Understanding bounced emails in Klaviyo](https://help.klaviyo.com/hc/en-us/articles/115005250408), any address
that hard bounces is suppressed automatically. A soft bounce is treated as temporary: Klaviyo suppresses the address
only after seven soft bounces in a row, it counts only soft bounces from the past two years, and one successful
delivery resets the streak. Once a profile is suppressed for a hard bounce or for the soft bounce streak, it is also
removed from every list it was on. The same article suggests you can suppress addresses that keep soft bouncing yourself before
they reach seven.

Subscribing again does not lift these suppressions. The suppression article says deliverability suppressions, such as
a hard bounce, survive subscribe actions to protect your sender reputation.

### Spam complaints and unsubscribes

When someone marks your email as spam or unsubscribes globally, Klaviyo stops sending them email marketing. These
profiles show the Unsubscribed consent status rather than a suppression reason, according to the same suppression
article.

## What verification adds

All of the above reacts to mail you already sent, and an address that keeps soft bouncing can take seven sends to be suppressed.
Verification checks the addresses before the next send. It catches addresses that would bounce, and some that a
bounce never reveals:

- addresses whose mailbox no longer exists ([`no_mailbox`](https://email-validation.org/docs/statuses/invalid/#no_mailbox), the kind that would
  come back as a [550 5.1.1 bounce](https://email-validation.org/bounce-codes/550-5-1-1/));
- throwaway addresses from [disposable](https://email-validation.org/docs/statuses/disposable/) mail services;
- addresses that accept mail but should not be mailed, such as known [spam traps](https://email-validation.org/docs/statuses/valid/#spamtrap)
  and [complainers](https://email-validation.org/docs/statuses/valid/#complainer), which are `valid` with the action `remove`;
- domains that accept every address, so a single mailbox cannot be confirmed
  ([catch-all](https://email-validation.org/docs/statuses/catch-all/)).

It does not replace Klaviyo's suppression. Keep both.

## Step 1: Export the profiles that can still receive email

There is no point paying to check profiles Klaviyo already suppresses. Build a segment whose condition is that the
person can receive email marketing (the same condition Klaviyo's own segment examples start with), or use the list you
plan to send to.

Then export it, following [How to export a list or segment to a CSV file](https://help.klaviyo.com/hc/en-us/articles/115005078687):

1. Go to **Audience > Lists & segments** and open the list or segment.
2. Open the **Manage list** or **Manage segment** menu and choose **Export to CSV**.
3. Choose which properties to include. Email is all the check needs.
4. Click **Start Export**. The file stays under **Settings > Other > Downloads** for 30 days.

## Step 2: Verify the file

Upload the CSV as a [bulk list](https://email-validation.org/docs/bulk/) in the dashboard and pick the email column if it was not detected. You do
not need to clean the file first: duplicates are removed for you, and malformed addresses, duplicates and `unknown`
results cost nothing ([cost](https://email-validation.org/docs/bulk/#cost)).

When the job is complete, download the results as CSV ([download options](https://email-validation.org/docs/bulk/#download)). Keep your original
columns so the Email column is still there. Three of our columns matter for Klaviyo:

| Column | What it holds |
|---|---|
| `ev_status` | `valid`, `invalid`, `catch_all`, `unknown` or `disposable` |
| `ev_reason` | why, for example `no_mailbox`, `spamtrap` or `role_account` |
| `ev_action` | `send`, `send_with_caution`, `remove` or `retry_later` |

Base your decisions on `ev_action`, not on the status alone. A spam trap is `valid`, because the mailbox accepts
mail, yet its action is `remove` ([actions](https://email-validation.org/docs/statuses/#actions)).

## Step 3: Save the results as custom profile properties

Properties let you build segments and flow filters on the result. Follow
[How to import profile properties using a CSV upload](https://help.klaviyo.com/hc/en-us/articles/1260806293150):

1. Make sure the first column of the file is headed Email.
2. In **Audience > Lists & segments**, create a new list (**Create > List**) and click **Upload contacts**, or open an
   existing list and choose **Manage list > Import contacts**.
3. Map `ev_status`, `ev_reason` and `ev_action` to new custom properties: open **Select or create new**, choose
   **Create New Field**, name it and pick the data type. Leave the other columns unmapped.
4. Do not select "Apply bulk consent". Klaviyo warns it can subscribe the imported contacts, including people who
   unsubscribed. Choose "Only import the consent in my file" and click **Import**.

Two cautions from that article. Contacts newly added to a list can enter its list-triggered flows, so import into a
new list with no flows, or set the connected flows to Draft first. And a blank cell does not clear an existing value,
so a later import only overwrites the properties it contains.

## Step 4: Suppress the addresses to remove

Create a segment with the condition **Properties about someone**, pick `ev_action` and match the value `remove`
(the same kind of condition Klaviyo's sunset flow article uses for its Unengaged property). That one segment holds the invalid and disposable
addresses as well as the `valid` ones that should not be mailed. Then suppress its members, following
[How to manage email suppressions and delete profiles in bulk](https://help.klaviyo.com/hc/en-us/articles/24312135764251):

1. Go to **Audience > Lists & segments**.
2. Open the action menu next to the segment and select **Suppress current members**.
3. If the dialog offers options, choose **Suppress everyone**. The other option, **Suppress inactive profiles**, keeps
   profiles that clicked or ordered within 182 days, which is not what you want for an address that should not be
   mailed at all.
4. Confirm with **Suppress profiles** (or **Bulk suppress**).

The alternative is a file. Filter the result file to the rows whose `ev_action` is `remove`, delete every column
except Email, then go to **Audience > Profiles**, click **View suppressed profiles**, open **More actions** and select
**Import suppressions**.

Either way, suppression covers only the current members; profiles that join the segment later are not suppressed
automatically. Klaviyo also has a 90-day rule: a profile that was manually suppressed and then unsuppressed cannot be
manually suppressed again for 90 days.

## Step 5: Handle the caution and retry rows

- **`send_with_caution`** covers [catch-all](https://email-validation.org/guides/catch-all-emails/) domains,
  [role addresses](https://email-validation.org/guides/role-based-email-addresses/) and a few `valid` reasons such as
  [`low_engagement`](https://email-validation.org/docs/statuses/valid/#low_engagement). Keep them, but use a segment on `ev_action` to send to
  them less often, and watch bounces and complaints for that segment.
- **`retry_later`** means the check got [no definite answer](https://email-validation.org/docs/statuses/unknown/) this time, for example
  because the receiving server was unavailable or deferred the check. Do not suppress these. Export them again in a few days and check once
  more.
- **Typos.** An `invalid` address with the reason [`likely_typo`](https://email-validation.org/docs/statuses/invalid/#likely_typo) may come with
  a suggestion in `ev_did_you_mean`. Do not swap in the suggestion without asking the person; suppress the old address
  and ask them for the right one through another channel if you have one.

## Engagement cleaning is a separate job

Verification tells you whether mail can arrive, not whether anyone reads it. Klaviyo handles engagement with segments
and a sunset flow, and its advice is to exclude rather than suppress at first.

Its [list cleaning article](https://help.klaviyo.com/hc/en-us/articles/360044054732) suggests an unengaged segment:
people who can receive email marketing, received at least 5 emails, and opened and clicked none in the last 90 days
(30 days if you send daily or several times a week). Exclude that segment from most campaigns, and suppress only the
"Never Engaged" segment, after a last attempt to win them back.

That last attempt is the sunset flow, described in
[How to create a sunset flow](https://help.klaviyo.com/hc/en-us/articles/360017518492). It is triggered by profiles
being added to a sunset segment, sends 1 to 3 emails asking people to unsubscribe if they are no longer interested,
waits a few days, then sets a Boolean property such as Unengaged to true on everyone who neither opened nor clicked.
Klaviyo has no flow action that suppresses email, so you finish with a segment on that property and **Suppress
current members**, as in step 4. Our [re-engagement and sunset policy](https://email-validation.org/guides/re-engagement-sunset-policy/) guide
covers how to choose the windows.

## Suppress, do not delete

Klaviyo recommends keeping suppressed profiles. Its bulk deletion
(**Settings > Other > Profile maintenance**) is permanent, and a deleted person can come back as a new profile, for
example by filling in a sign-up form again, without the suppression that protected you. A suppressed profile stays
in your account, so it cannot return that way. Suppressing or deleting profiles does not lower your plan by itself;
the bulk article says you downgrade manually unless your account downgrades automatically.

## Keep it clean

Check new addresses on your own forms before they reach Klaviyo
([sign-up form validation](https://email-validation.org/docs/guides/signup-form-validation/)), and verify the sendable list again before a large
send. Never import bought lists: Klaviyo's [anti-abuse article](https://help.klaviyo.com/hc/en-us/articles/115000308972)
says buying lists violates its Terms of Service, and verification does not supply the missing consent
([bought email lists](https://email-validation.org/guides/bought-email-lists/)).

## Questions

### Does Klaviyo remove bounced addresses by itself?

Yes, after the fact. It suppresses an address after one hard bounce or seven consecutive soft bounces within two
years, and removes it from its lists. Verification lets you remove addresses that would bounce before you send.

### Should I suppress or delete invalid profiles?

Suppress them. Klaviyo recommends it, suppressed profiles do not count toward the email plan's active profile limit,
and a deleted address can return through a sign-up form without its suppression.

## Try it

Upload your Klaviyo export for [bulk email verification](https://email-validation.org/bulk-email-verification/), or try one address in the free
[email checker](https://email-validation.org/email-checker/).

## Related

- [Bulk lists: upload, cost and result columns](https://email-validation.org/docs/bulk/).
- [Statuses, reasons and actions](https://email-validation.org/docs/statuses/).
- [Glossary: suppression list](https://email-validation.org/glossary/#suppression-list).
- [General list cleaning steps](https://email-validation.org/guides/email-list-cleaning/).

## Related guides

- [How to clean an email list](https://email-validation.org/guides/email-list-cleaning/)
- [Re-engagement campaigns and sunset policies](https://email-validation.org/guides/re-engagement-sunset-policy/)
- [How to clean a Mailchimp audience](https://email-validation.org/guides/clean-email-list-mailchimp/)
- [Cleaning a Brevo contact list](https://email-validation.org/guides/clean-email-list-brevo/)
- [Reduce your email bounce rate](https://email-validation.org/guides/reduce-email-bounce-rate/)
- [All guides](https://email-validation.org/guides/)

## Sources

- [Klaviyo: Understanding suppressed email profiles](https://help.klaviyo.com/hc/en-us/articles/115005246108):
  suppression reasons, spam complaints and unsubscribes, suspicious addresses, plan counting, keeping vs. deleting.
- [Klaviyo: Understanding bounced emails in Klaviyo](https://help.klaviyo.com/hc/en-us/articles/115005250408): hard
  and soft bounce handling, the seven-bounce rule, removal from lists.
- [Klaviyo: How to export a list or segment to a CSV file](https://help.klaviyo.com/hc/en-us/articles/115005078687):
  export steps, roles, the Downloads page.
- [Klaviyo: How to import profile properties using a CSV upload](https://help.klaviyo.com/hc/en-us/articles/1260806293150):
  property import, consent options, flow caution.
- [Klaviyo: How to manage email suppressions and delete profiles in bulk](https://help.klaviyo.com/hc/en-us/articles/24312135764251):
  bulk suppression, suppression import, the 90-day rule, bulk deletion.
- [Klaviyo: How to clean your email list to maintain good deliverability](https://help.klaviyo.com/hc/en-us/articles/360044054732):
  unengaged and Never Engaged segments, exclude vs. suppress.
- [Klaviyo: How to create a sunset flow](https://help.klaviyo.com/hc/en-us/articles/360017518492): sunset segment,
  flow steps, the final property update.
- [Klaviyo: Understanding Klaviyo's anti-abuse and campaign performance monitoring](https://help.klaviyo.com/hc/en-us/articles/115000308972):
  purchased lists and its Terms of Service.

## Get up to 500 free credits. No card needed.

New accounts get 500 free credits (100 when you sign up with a free email provider such as Gmail, Outlook or Yahoo, or another personal mailbox such as a paid one like Fastmail or one from your internet provider). Try it on your own list before you buy. [Create your account](https://email-validation.org/signin/?new=1) or [open the free email checker](https://email-validation.org/email-checker/).