<input type="hidden" name="list" value="1,2,3">
|title||Multiple lists and confirmation requests|
|In case a recipient subscribes to more than one list, the system will still only send one confirmation request message, which will allow the recipient to confirm their subscription to all the lists included in the signup request. Note that the system will use the message templates (e.g. subscription confirmation request message and subscription confirmation message), as well as the Web page templates defined for the first List that the recipient was subscribed to.|
The “value” field must contain the ID of the list the recipient will be subscribed to. You can see that numeric value shown in the MailUp admin console under Settings > Edit lists or looking at the dropdown menu at the top left of the page. In the image, the list called "New products" has value=3.