Labels:text | screenshot | font OCR: MICROSOFT'S MESSAGING ARCHITECTURE: OLD VS. NEW SMTS Gateway Exchange proprietary >> SMTP transport Exchange message store Exchange message store version 4.5 Correcting a Corrupting Influence. Exchange 4.0 translates the SMTP protocol into the Exchange proprietary transport protocol before storing the message in the user's in-box. Translation impacts performance negatively, and there is a potential for messages to get corrupted during the transla- tion process, With Exchange 4.5, messages coming in on the SMTP trans- port can be stored directly in a user's in-box without any protocol translation, improving performance and eliminating the potential for mes- sage corruption.