As far as I knew the server is lacking the layout rendering engine. Since it can't render any layout it can neither print a layout nor export a layout as a PDF. And as nothing is exported nothing will be imported.
Best regards Magnus Fransson.
Part 1 fixed by removing the emails it couldn't reach.
So is the best bet just to use a plug-in?
As Magnus mentioned, FM server can't render a layout and therefore can't generate a PDF - a sore point for many many years for us developers.
Although there are some complicated ideas out there, the simplest to date is using a 'bot', a client running FM Pro (often developers use the server itself despite it not being 'good practice') that can generate PDFs either by running a timed script to check for a raised flag or by triggering a script remotely on demand (I think Six Fried Rice came up with the idea, adopted by SeedCode too).
If you already have the PDFs and don't need to generate, you can do this using 'insert from url' or by using the MBS plugin that has a ton of other useful functionality.