Same here.  One of our clients has a mailing list that includes all staff, plus a number of external partners.  To accomplish, they created an AllUsers alias and flipped ON the "include all domain users" switch.  The alias was added as a list subscriber so all employees are automatically subscribed via the AllUsers alias-- a real time-saver and error-saver when you have over 1,800 employees and dozens of new hires per month.

Problem is, if even ONE employee hits the unsubscribe button, it drops the AllUsers recipient from the list, which means the list immediately loses 99% of its recipients.  That happens several times per month.

Our admin opened a ticket months ago with a feature request to give domain admins control over Unsubscribe, but so far it has not been added.  

Exchange has several options for Subscribe/Unsubscribe, one of them being only an admin can remove a user-- a function we use extensively on our Exchange server, but there is no such option on Smartermail.

Please UP-vote this thread if you agree.

 

So, just to be clear, we're talking about the "Unsubscribe from these emails." line at the top of the message in webmail?

I only ask as we may be able to remove that, but not sure there's much we can do in clients that have the same, or similar, functionality.