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Reply-to addresses now produce typed events. Subject, from, attachments, threading metadata — all signed.
Median latency on Microsoft 365 dropped from 412ms to 276ms after a routing rework.
Workspace admins on Business+ can now require SSO. Okta, Azure AD, Google Workspace tested.
Resolved an edge case where on-prem Exchange tokens expired silently overnight.
Pin sends to one of 14 regions for data residency. Configurable per mailbox or per send.
New signing scheme (HMAC-SHA256 over canonical JSON), replay window, 3× delivery retries.