PMDF User's Guide
OpenVMS Edition

When you receive messages containing files, you can extract them to an external file with the EXTRACT command. Note that the EXTRACT command will, when you are reading a multipart message, extract only the last read message part. To extract several parts to individual files, just read a part, extract it with the EXTRACT command, and then read the next part with the NEXT/PART command. If you want to extract the entire message to a file, use the EXTRACT/ENTIRE command.

See Section 1.1.8 for an example PMDF MAIL session showing how to extract a received file from a message to an external file. Additional examples are given in the documentation of the EXTRACT command.