|I just tried it and found it works just fine.|
Sort your names using the asterik column to segregate the names you need in your email.
Lets say your firstname and lastname are in A1 and B1.
In C1 use =CONCATENATE(B1&" "&A1&;)
That's B1(lastname) followed by a space and C1(firstname) followed by a semi-colon.
Drag it down your column.
Select column C.
Right click on Column C and select Copy.
Right click on column C and select Paste Special, Data.
Click on C1, hold down the Shift key and hit the Down Arrow key to select all the cells in column C with your formatted names. Right click and select Copy.
Open your mail message and click into the To: field.
Hit Ctrl+V to Paste all of your names. (It looks messy at this point)
Hit the Check Names button (or Tools, Check Names) to bring them all into your message.
Hope this works as smoothly for you,