I’m running EXM 3.1.2 on one client site, and there is a bug when creating a scheduled message (fixed in EXM 3.2). After assigning a Recipient list with existing entries, I clicked on the Schedule button and got this message:

“There are no recipients included in this message. On the recipients tab of the message, the included list must contain at least one recipient”

To patch this, follow these steps for the files attached here:

1. Copy the attached UpdateListRecipientsCount.aspx page to the \Website folder of your CM server;
2. Request the <CMHostName>/UpdateListRecipientsCount.aspx page in browser and click the “Start update” button on the page in order to fix counters on all existing lists;
3. Copy the Sitecore.Support.58703.config file to the \App_Config\Include\EmailExperience folder on CM;
4. On each Sitecore instance, copy the Sitecore.Support.58703.dll assembly to the \bin folder and replace the \sitecore\ContactLists.ashx with the attached one.

Now when you click on Schedule you will get this popup, click the blue “ok” button and you are on your way :)