Seen some weird tenant.onmicrosoft.com in delivery/read receipts in from headers so that I believe Microsoft is using the domain itself for send/receive functionality inside exchange tenant config
Colin Sent from my iPod > On 17 Jan 2024, at 14:28, Paul Menzel via mailop <mailop@mailop.org> wrote: > _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
