The chat.vim.wtf chatmail relay was impacted by outbound SMTP rate-limiting imposed by the hosting provider, resulting in significant delays in message delivery. Once I realized the issue (and had the free time to do something about it), I migrated the service to another provider which doesn't throttle outbound email delivery. The new server will cost me about an extra dollar per month but should ensure long-term reliability of the service.
After two years of using a fancy syntax highlighting setup to spruce up code blocks, I've ripped it all out and gone back to basics (or at least the default Chroma-powered highlighting that ships with Hugo).
