Support Superstar Artois posted this earlier on the Pantheon Discord: "We have found the issue with the non delivery of buddy keys as well as non delivery of any password reset requests at the account.pantheonmmo.com site. We will begin resending the buddy keys that were not received starting tomorrow evening around 7PM Pacific time. We will continue to send them out in batches over the next couple of days. We know who didn't get a key in their email so there is no need to email us unless you don't get one by mid week.
For password reset emails, the system will not be sending them until probably late tonight or early tomorrow. However, we can manually reset your password for you if you open a support ticket"