An interesting question. I use the IndieWeb suite of plugins on my site. It posts webmentions. These can be sent to mastodon via plug-ins and https://brid.gy which also feeds comments back to my own site via webmentions.
I quite often just POSSE manually as it makes me a little more thoughtful.
Bridgy can also syndicate to twitter, pinboard & GitHub.
Hi @johnjohnston@mastodon.social, I see you are syndicating posts to Mastodon. Attempting to do the same but have encountered a couple of snags. Wondered if you would mind sharing how you got it working? I went with IFTTT and webhooks.