Keap email verification options using mailfloss
When mailfloss finds an invalid email in Keap, the Cleanup tab decides what happens. You have five options. The setting applies to every list in the connection, and you can change it any time. Before you choose one, make sure you have connected Keap to mailfloss. You only need to do this once. From then on, mailfloss verifies the connected Keap account automatically.
To choose an option, go to Integrations, open your Keap integration, and click the Cleanup tab:

Ask me first. The safest option. mailfloss lists invalid emails in the Waiting for you tab, and nothing changes in Keap until you decide:

The Waiting for you tab appears only when emails are waiting. Select the emails and click Unsubscribe, Delete, or Update custom fields. You can also report a wrong status with Report incorrect, or dismiss an email with Ignore.
Unsubscribe. The recommended option. mailfloss unsubscribes the contact from Keap, so it stops receiving campaigns. mailfloss asks you to confirm when you choose it, and a switch under the option can also update the mailfloss fields. You'll see the contact in Keap as "Status: Opt-Out: Admin". You can resubscribe the contact in Keap at any time.

Delete from Keap. Removes the contact for good, so you won't find it in Keap anymore. Before Delete turns on, mailfloss shows what your last run would have deleted and asks you to type the account name to confirm.
Update a field. mailfloss writes the verification result to custom fields in Keap, so your segments can exclude invalid emails. This is reversible. You can also use the fields to sync with your other databases and CRMs, or in automations.
For finding this information, go to "Contact information" and click on the "Custom Fields" tab.
If you need more information about our custom fields check this article.

Report only. mailfloss emails you the results of the latest floss session. Nothing changes in Keap. Like a traditional email verification service, it gives you a report of the verification results for the connected Keap account and nothing more.
For an overview of what mailfloss does for Keap, see the Keap integration page.