Account inactivity reminder
I'm going to go with no. There's at least two responsibilities in your description alone:


Determine accounts that are about to expire due to inactivity.


and


Notify users of a situation (in this case, the inactivity expiry).


And then in your code, you have a third:


Disable expired account.


I can potentially see the first and third items being in a class together. But user notifications lumped into this smells and likely should be separated.