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# X400: How the Gateway Handles Non X.400 To/Cc Addresses

Article ID: 112039

Article Last Modified on 10/30/2006

APPLIES TO

- Microsoft Mail Gateway to X.400 2.1
- Microsoft Mail Gateway to X.400 3.0
- Microsoft Mail Gateway to X.400 3.2

This article was previously published under Q112039

## SUMMARY

When version 2.1, 3.0, or 3.2 of Microsoft Mail Gateway to X.400 builds an X.400 message and finds that recipients of foreign messaging systems (for example SMTP, PROFS, MCI, etc.) have been copied on the message, it places the non-X.400 recipients and puts them in the free-form-name field of the X.400 P2 header.
This means the receiving X.400 user-agent must display the free-form- name(s) to its X.400 recipient in order for that recipient to see that non-X.400 users were copied on the message.
This is an interoperability issue since specific X.400 implementations may not display free-form-name since support for free-form-name is not mandated by NIST, OSTC or INTAP.

Additional query words: 2.10 3.00 3.20

Keywords: KB112039