How Constant Contact and MailChimp Manage Bounces

While MailChimp and Constant Contact are both email service providers, MailChimp manages bounced emails differently to ensure high delivery rates. If you are moving your list from Constant Contact to MailChimp, it is important to understand how each email service handles bounces so your transition to MailChimp is as smooth as possible.

Below, you’ll find information on bounces and how Constant Contact and MailChimp each manage bounces.

What are bounces?

When your email can’t be delivered to an email address, it's called a bounce. Below are a few common reasons for bounces.

  • Email address doesn’t exist
  • Recipient’s mailbox is full
  • Recipient’s email server has blocked delivery

Internet service providers (ISPs) require email service providers (ESPs) like MailChimp and Constant Contact to enforce email bounce rates that remain below industry standards. The lower the bounce rate an ESP is able to maintain, the better the reputation it has with ISPs. This translates to high email delivery rates for the ESP’s users.

How do Constant Contact and MailChimp manage bounces?

Both Constant Contact and MailChimp report bounced email addresses, but each service manages bounces differently. Constant Contact allows its users to manage their own bounces and remove them from their list. MailChimp monitors bounces and automatically removes email addresses from the list when they bounce for a permanent reason like when an email address is nonexistent.

What should I do before I import my Constant Contact list into MailChimp?

When you export a list from Constant Contact, it includes all email addresses in your list, including bounced email addresses. If all of the bounces are imported into your MailChimp list, it could result in a bounce warning or bounce suspension.

Before you export your active list as a CSV file from Constant Contact, clean your list of any addresses that are in the Recommended for Removal category in your Constant Contact account.

Was this article helpful?
What can we do to improve articles like this?

Technical Support