---
title: Use a Master List for faster flossing
slug: use-a-master-list-for-faster-flossing
docTags: 
createdAt: 2024-07-12T19:15:32.914Z
---

When you click the **Verify now** button, our system loops through all of your lists for certain integrations to perform an import. This is due to limitations with the integration's API. This method can be slow and expensive. To enhance your experience and streamline the process, we recommend using a single, Master list for your imports.



The current list import process impacts the following integrations:

- Benchmark
- Braze
- Campaign Monitor
- Iterable
- Mailchimp
- Mailigen
- MailUp
- Moosend
- Sendlane
- Sendloop
- SendPulse

If you use one of these integrations, we recommend using a Master list of all the contacts you want flossed. It will be significantly faster and reduce potential errors with duplicates and credits.

### How to select and floss your master list

Here’s a brief guide on how to select and floss your master list. 
For a complete explanation of how to floss specific lists, you can find a guide [here](https://docs.mailfloss.com/how-to-floss-only-a-specific-email-listsegmenttag).

**1. Open your integration and click the Audiences tab.**

![](https://api.archbee.com/api/optimize/yGUejq6E8IJ_sYX6JSjSr/WXydmQ-sGwxde99mxlAEo_integration-tabs-audiences-highlighted.png)

**2. Make sure you have enough credits to cover your master list.**

**3. Find your master list and click Verify this list. mailfloss verifies only that list.**

![](https://api.archbee.com/api/optimize/yGUejq6E8IJ_sYX6JSjSr/a7it2r1Oy_vIG1R5Qv7Wq_audiences-tab-verify-this-list.png)



By adopting the practice of using a single, Master list, you can significantly improve the efficiency, speed, and cost-effectiveness of your email verification process. We encourage you to implement this method and experience the benefits firsthand!