I’m not sure if you have to input the email addy’s within the 400 or not, but we’ve ran into this issue before and use the new version of the RPM software, on the Windows side. This way there is absolutely no programming on the 400 side, it’s all done on the Windows side which should save you time.
RPM will take the AS400 print file, convert it to PDF, and then email the file to one or many recipients. You can also write to disk at the same time so it will archive your print jobs giving you a complete print history from your 400 that can be pulled up later.
Either way works, using the OVRPRFT for the invoice then printing. But with RPM all can be setup, converted to PDF and emailed easily, the entire process takes less than 10 minutes.
You may want to give it a shot. Especially if you have more than one programmer on the 400 working, it will save you the headaches RPM will convert AS400 print files to PDF.
Best of luck to you!