> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://support.promo.ly/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# How often is list analysis performed?

We will periodically perform list analysis as you add new contacts. We will only perform list analysis after you have sent your first campaign. This is to ensure new subscribers can start using Promoly immediately.

**How much does list analysis cost?**

List analysis is free. We only charge if you choose to clean your list using our automated cleaning process.

**Does the list cleaning process delete my emails?**

No. The list cleaning process does not delete any of your email. We simply apply a filter and the contact will remain in your list, however we will no longer send emails to the contact.

**More Info**  
[Read more about List Analysis and Cleaning](/en/article/free-list-analysis-8rjcw/)