You can take off the tinfoil hat, amigo

Don't expect the reps to know much technically, as they aren't expected to have a high level of knowledge about the systems they use.

A lot of these corporate systems send out unnecessary extra files like that. Nothing to be alarmed about. You do realize you could simply call them up and request a proper PDF, right(?) They might even be able to send you an old fashioned fax. It's also possible that they could provide you with this info via the myattwireless customer portal. Perhaps that portal has been updated recently. Ask them.