Sender Rewriting Scheme (SRS) Expanding to SMTP/Mailbox Forwarding
We’re making changes to SMTP forwarding from mailboxes in Exchange Online. This change will result in forwarded messages being rewritten with Sender Rewriting Scheme (SRS).
We’ll further consolidate our rewriting feature for messages that are automatically forwarded outside of Exchange Online. Today, not all forwarded messages are rewritten using SRS. Messages forwarded with SMTP or mailbox forwarding have their P1 Mail From address replaced with the forwarding mailbox address. This behavior will change to use SRS rewriting instead. The change will be rolled out slowly, and it might take time to reach your organization.


HANDS ON tek
M365 Admin





