You may have a list with aktivix – or any other provider of mailman lists. This applies to most if not all mailman list services.

So you are one of the administrators of a mailman list – because you really, really should be one of several administrators.

And you may think that it has been hacked because you continue to receive spam sent to you specifically, starting with “Hi . Most likely it is addressed to the list, then blocked as it comes from an address not subscribed to it, or to the owner of the list, which is, all the addresses listed in the ‘admin’ field.