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Clean your Constant Contact list

Export your contacts from Constant Contact as a CSV, verify every address, then import the valid file back and keep the risky one out of your first send. Verification finds addresses that cannot receive mail. It cannot tell who will read or welcome your email, and an address it cannot confirm is called risky, never valid.

Export steps and bounce rules read from Constant Contact's own pages, checked 23 Oct 2026.

1. Export the CSV from Constant Contact

  1. In Constant Contact, open the Contacts page. Search or filter by email status or list status if you only want part of it.
  2. Select a contact, then click the Select all contacts link.
  3. Click Actions > Export selection.
  4. Tick the contact fields to include and click Export.
  5. Download the CSV from your import/export activity.

You can also export a single list, segment or tag. Exporting makes a copy and does not remove contacts from the account.

Source: Constant Contact help. The shorter version is on the Constant Contact export page.

2. Constant Contact's bounce rule: no number published

Constant Contact publishes no account bounce percentage. It marks an address Suspended once it has repeatedly bounced as non-existent across any Constant Contact account and will not send to it again.

Source: Constant Contact knowledge base: manage bounces, read 23 Oct 2026.

Where a platform does not publish a number, we say so rather than quote a blog. Plan as if the line were 2%.

Other platforms' lines are in bounce rate limits by platform.

3. What verification can and cannot tell you

It can tell you

  • The address is malformed or the domain has no mail servers.
  • The mailbox does not exist, where the provider answers the check.
  • The domain is disposable.
  • The domain accepts all mail, so the address cannot be confirmed.

It cannot tell you

  • Whether the person reads your email or agreed to receive it.
  • Whether the address is a spam trap.
  • Whether a risky address is real. Catch-all domains and providers that hide mailbox status stay unconfirmed.
  • Whether the contact still works at that company.

Unconfirmed always means risky, never valid. You get three files back, valid, risky and invalid, with your original Constant Contact columns kept.

4. Import the clean file back

  • Keep the columns as they came out of Constant Contact, so the file maps back to the same fields on import.
  • Import the valid file into Constant Contact or the tool you send from. Use Constant Contact's own import help for the exact screens.
  • Hold the risky file back. If you send to it, send small batches later and watch the bounce rate against the rule above.
  • Drop the invalid file, or mark those contacts as bad email in Constant Contact so they are not mailed again.

Check a Constant Contact address, then your list

Type any address. It gets the same check the paid plans run: syntax, the domain’s mail servers and, where the provider allows it, a live mailbox check. Nothing is sent to the address.

Five checks a minute, no account needed. Nothing is sent to the address — we ask its mail server whether the mailbox exists, then disconnect.

Have a list? Sign in with Google and the first 100 addresses are checked free, with results to download. No card.

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Common questions

How do I export my contacts from Constant Contact?
In Constant Contact, open the Contacts page. Search or filter by email status or list status if you only want part of it. Select a contact, then click the Select all contacts link. Click Actions > Export selection. Tick the contact fields to include and click Export. Download the CSV from your import/export activity. You can also export a single list, segment or tag. Exporting makes a copy and does not remove contacts from the account.
What bounce rate does Constant Contact allow?
Constant Contact publishes no account bounce percentage. It marks an address Suspended once it has repeatedly bounced as non-existent across any Constant Contact account and will not send to it again. Source: Constant Contact knowledge base: manage bounces, read 23 Oct 2026.
Does a "valid" result mean the person will read my email?
No. Verification tells you whether an address can receive mail, not whether the person reads it, wants it or agreed to it. It cannot detect spam traps either.
What does a risky result mean?
A risky address could not be confirmed as a real mailbox, usually because the domain accepts all mail (catch-all) or the provider will not say. Unconfirmed addresses are never reported as valid. Keep them out of your first send and mail them later, in small batches.
Is there a free way to try this on my Constant Contact list?
Yes. Sign in with Google and the first 100 addresses are checked free, with results to download and no card. After that, verification is $29.99 a month on the Pro plan.

Clean your next list before it bounces

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