email authentication Archives

08 Jun 2026

Email Senders Face Microsoft SNDS Migration Deadline with Authentication and API Changes

Microsoft is retiring the original Smart Network Data Services (SNDS) portal on June 8, 2026, with significant changes affecting authentication workflows, automated complaint feeds, and report parsing for email senders to Outlook.com addresses. The migration involves moving reports to a REST API, implementing 30-day link expiry, changing JMRP complaint formats to header-only ARF, and requiring 10-month network access renewal cycles....

29 Apr 2026

ARC Email Protocol Experiment Ends as Industry Shifts to DKIM2 Standard

by Dave Murphy

in Authentication, Deliverability, Featured Posts

Comments

The IETF has proposed reclassifying ARC (Authenticated Received Chain) email protocol as 'Historic,' effectively ending the experiment due to reliability issues. This means email marketers can no longer depend on ARC to protect mail authentication when messages pass through intermediaries, while the industry transitions to the more robust DKIM2 protocol....