check before: 2021-11-05
Online, World tenant
Admin impact, User impact, Feature update
We're making some changes to which forwarded messages are rewritten with Sender Rewriting Scheme (SRS).
Starting in early November, we will be further consolidating our rewriting for messages that are automatically forwarded outside of Exchange Online. Not all forwarded messages are rewritten using SRS today. Messages forwarded with SMTP or mailbox forwarding have their P1 Mail From address replaced with the forwarding mailbox address today. This will be changing and SRS rewriting will be used instead.
The change will be rolled out slowly and it may take several months to reach your organization.
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