api replacement for mapi an 3-party-SW

GW 18.1.1, several programs using simple mapi

MF can no longer bundle WMS as Microsoft prohibit to redistribute them.

The problem is, that some programs using simple mapi no longer works correctly, as some mapi calls are not completely fulfilled by the actual implementation of mapi-calls-redirection in GW (SR/Bug verified, but no solution for now).

What is the preferred interface for 3-party-SW that needs to send automatically e-mails over GW (the outgoing mail should be visible in outbox of the user, so no smtp...) with following things: recipient, subject, message, attachment, signature?

AFAIK, C3PO and GroupWise Object API is dropped by MF, too

Any ideas?

Thanks, Markus