I didn't say anything about it being hard; just that you may have to use some proxy for sending mail rather than doing it directly. This is not hard.
It does mean that you are slightly less than perfectly self-hosted, in some sense.
If your mail server is in a position that it can send mail directly to any mail exchanger in the world, rather than going through a forwarding host, there is the advantage in that it can use end-to-end TLS.
It does mean that you are slightly less than perfectly self-hosted, in some sense.
If your mail server is in a position that it can send mail directly to any mail exchanger in the world, rather than going through a forwarding host, there is the advantage in that it can use end-to-end TLS.