Clearer: set a body to read from, then change it when necessary. Fewer instructions! Also, mail clients don't really know what to do with text/markdown, so just use text/plain; that's what Gruber would want. Adds basic test case too

This stuff is generated programaticall now.

Moved to package sys, generated dynamically (and tested!).

This seems clear enough. In the regular email world we want direct recipients to be signalled in some way of our message. Recipients merely copied in (CC'd) don't need to be alerted but still get the message.

We've already looked up the entire actor so may as well return it, then let callers do what they want with the data.

This gets us a bit closer to seeing Mastodon's non-standard Mention activities.

For some reason http.DetectContentType can't work out that we're sending JSON.

Not ideal to rely on live system available over the internet but we'll get there eventually maybe.

That is, delegate all message handling, incoming and outgoing to a short-lived process. Maybe this is really like sendmail but I dunno. Anyway it works and this is a big and bad enough commit already!

Now defaults to whoever owns the process.

This was debug logging from a while ago.

I made a bit of an announcement to fediverse@lemmy.world: https://old.lemmy.world/post/12791602 Replies were delivered ok to my ActivityPub inbox and my mail inbox. And I replied to those from my email client, too!