I can't send group emails of 10, 25 or 50 category addresses. When I try I get message: "No matches found". Followed by: "Message could not be sent. One or more of the recipients do not have an email address. Check to see if all recipients have a valid email address".
When I first established a category, then it went through OK. But only that one time. After that no. All recipients have valid email addresses. I use Windows Ultimate, W. 7 with Windows Live Mail.