On further information, it seems the contact attempt was a message to my gmail address, which is not the contact information I have on file for PyPI, and is the address I use for bulk things like mailing lists. I am now more frightened that missing an email to an alternate address (that address gets literally hundreds of messages/day, and I do not attempt to read all of them, hence I don't use it as a contact address for important things) can result in this type of action.