From my understanding client submission refers to TCP
587.https://learn.microsoft.com/en-us/exchange/mail-flow-best-practices/how-to-set-up-a-multifunction-device-or-application-to-send-email-using-microsoft-365-or-office-365#how-to-set-up-smtp-auth-client-submission
Device or Application setting Va...
What about senders that are NOT a 'cloud-hosted Mailbox' and are an
anonymous sender via connector routing out through M365, e.g. using
On-Premise Exchange via hybrid connector. Are you attributing to sending
SMTP address and not 'mailbox' - This needs clarification as your
current statements do not...
We use SMTP AUTH over port 587 and in my understanding, this is not
"Basic auth with the Client Submission (SMTP AUTH)".Is that correct?The
endpoint smtp.office365.com will still be available over port 587 after
December 2025? Thanks for the clarification.
How do I test for this change? My application runs along with powershell
which involves invoking EXO. Is there a way to selectively remove
ApplicationImpersonation from GlobalAdmin or ExchangeAdmin roles or DENY
the role at the user level?
Hey there, If we want to send a school notice to all parents, it will be
failed as external recipients limit is 2,000 per day.Any thoughts?
External recipients2,000 per day (per account)
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