First week of July we will cut over to a new mailserver, which allows us to use different "hover-domains" (meaning a user sees something else than the domain we used as the default up to now). Right after, we will get started on PDF attachments and you will see that feature in the third quarter.
To make sure the new mail server will not get blocked, please whitelist any of the following, which fits best in your environment.
Domain: phishtest.knowbe4.com
IP Addresses: 23.21.109.197, and 23.21.109.212 (Amazon Web Services)
Email Header: X-PHISHTEST
