Been trying to turn my blog into an ActivityPub server, following Gargron's "How to implement a basic ActivityPub server" guide among others, and failing at the very first step, WebFinger. Searching for the username in Mastodon returns no result — and sometimes, but not always (?!), displays a "503 Remote SSL cert could not be verified" error. I don't know where to go from there, short of installing my own Mastodon server to see some error logs, which is a lot more than I'm willing to do.
Want to know when I post new content to my blog? It's a simple as registering for free to an RSS aggregator (Feedly, NewsBlur, Inoreader, …) and adding www.ff00aa.com to your feeds (or www.garoo.net if you want to subscribe to all my topics). We don't need newsletters, and we don't need Twitter; RSS still exists.