The Mailing list ID is the unique identification number of your Mailing list.
You can find the Mailing list ID by following the steps below.
1. Click on the Mailing lists button, located on the left side of your Moosend Account.
2. Click on the name of the mailing list, the Mailing list ID of which you wish to find.
3. The Mailing List ID will appear just below the name of your mailing list, on the left top corner of your page.