I'm not seeing it

The only reason why I ran a mail server at all was so that I could hand out aliases to family with (name)@(surname).org. All I did was set it up to forward to their normal email address.

That doesn't work anymore, for all the same reasons that a dumb mailing list server doesn't work anymore.

In theory it should be possible to setup a simple mail forwarder that munges all the headers just the right way to make it work, but I just didn't consider it worth the effort to maintain. Since an online service did it reliably and for (almost) free and I don't bother anymore.