People have used UEM to create a mass emailing system by combining it with DataAssist and creating a system where emails can be sent in bursts to a couple of hundred users at a time. Your ISP probably has strict limitations in the number you can send per second, minute, or day that you would have to be careful not to exceed.
Any mass email application you build would at some point send an email. WAUE can be used to do that. The applicaiton would have to be built by you and it wouldn't be as simple as telling WAUE to send as many emails as you want and it will be done. There will be limits and you would have to work around them... usually by offering a way to send emails in batches.
Do you have any links that could give us more ground work to create such a burst system? Also we all need to think opt out also so we need to know the uses email address so when why reply we have a string that relates to the users account and allows a one click opt out.
Any info you have on this could help those of us that are looking to start programming this from the ground up.
Thanks in advance,