I used to work on the O365 antispam team, and I'm not sure how much I'm allowed to say in public, but I'm pretty sure I can publicly say "a very large and ugly spreadsheet that gets passed around between a few teams using a ticketing system" is not accurate.
Originally, the product started out as an acquisition, and there's still some legacy code that references the old Forefront name. There's about 50 people on the team.
Relevant wikipedia page: https://en.wikipedia.org/wiki/Exchange_Online_Protection
Originally, the product started out as an acquisition, and there's still some legacy code that references the old Forefront name. There's about 50 people on the team.
DKIM/DMARC/ARC is worked on by two engineers.