Lol.. if this is the case they should STFU and go fix their own service and apologize for being hypocrites. One thing I can't understand is do they just have

Lol.. if this is the case they should STFU and go fix their own service and apologize for being hypocrites. One thing I can't understand is do they just have the one domain? Like almost any good email relay, possibly having more domains to register or a custom domain to register from will fix the issue. This is like being surprised ProtonMail gets blocked when spammers use the service primarily due to anonymity. Duh.. Microsoft Teams doesn't want a bunch of anonymous spammers using their service. Who would have thought?