MDaemon will check the ISP mailbox you’ve configured at Setup -> Server Settings -> DomainPOP every 5 minutes on a default installation.
You can change this frequency via Setup -> Event Scheduling -> Mail Scheduling -> Mail Sending & Collecting, by moving the slider bar indicated in the image below :-
![](https://blog.zensoftware.co.uk/wp-content/uploads/2021/01/image-8.png)