When sending mail to Pathworks Mail users, it is possible to have PMDF write the message using Pathworks' own attachment format. Remember only one attachment is supported by Pathworks Mail, other attachments in the same message will not be visible when viewing Pathworks Mail.
The only step is to add appropriate instructions to the CHARSET-CONVERSION table in your mapping file to activate conversion. A single entry of the form
CHARSET-CONVERSION IN-CHAN=*;OUT-CHAN=l;CONVERT Pathworkswill activate the conversion procedure for all messages entering the local channel. The Pathworks attachment format is used under the MIME structure, so the message is still in proper MIME format for the local users not using Pathworks Mail.