Isode supports solutions for the Aviation Industry, to provide AFTN/AMHS Gateways, allowing conversion between the older AFTN standards and the X.400 based AMHS.
Some organizations are using email/AFTN gateways, which provide an interconnection between AFTN, and local email systems.
Isode provides M-Switch MIXER, which converts between X.400 and Internet email according to the MIXER Internet Standard. An “obvious” approach for an organization with an email/AFTN gateway is to handle AMHS integration using MIXER.
This turns out to be a VERY bad idea. In part, beasue there is no standard approach to email/AFTN integration, but more importantly because is would block client access to important AMHS features.
More details are in the latter sections of the Isode White paper: http://www.isode.com/whitepapers/amhs-delivery.html