Powermta 60r3 -

Authenticated Receive Chain (ARC) support helps preserve email authentication results (like SPF and DKIM) as messages pass through intermediate servers.

If you are looking to upgrade from previous versions or build a new high-throughput infrastructure, is the recommended standard. powermta 60r3

Monitoring "pre-bounce" signals and connection drops is smoother, giving postmasters better data to tune their configurations in real-time. modern authentication mechanisms

The 6.0r3 architecture focuses heavily on performance optimization, modern authentication mechanisms, and smarter queue management. 1. Native Architectural Performance powermta 60r3