Update 10/22/2025: Addition of two more FAQs.
In May 2024, we shared our Exchange Server Roadmap Update and our plans for the future of Exchange Server. Since then, we’ve been asked some questions ...
Updated Oct 22, 2025
Version 18.0
Blog Post
Does or can anonymous SMTP relay to an Exchange Server SE (only "authenticated" by the IP address of the sending host (RemoteIPRanges)) count as client access in terms of the need of an Exchange CAL?