X.400 gateway products wanted

[Al Borup]

We are looking for any information pertaining to X.400 gateway products and
associated APIs for SCO UNIX System V.  WE would like the UNIX system to act as
a user agent into an X.25 private network or PDN such as Telenet's Telemail 400
or AT&T mail.  The API should consist of a C library for allowing us to provide
our own custom front end.  Any help would be greatly appreciated.
...
Al Borup  programmer/analyst for Boise Interagency Fire Center.
Phone (208) 389-2480  - don't know if I can receive e-mail or not...