One thing is "appearing to work fine", something else is "supported" 😉
One thing is "appearing to work fine", something else is "supported" 

*.email records, even though they might work, they were not actually supported.email some special allowed edge case that I guessed...?*.anything would work.
fetch event in a Snippet, so it wouldn't matter..email" as a sub-domain, I would personally still not consider it to be officially supported.fetch from my Pages to bounded Mail Workers and from the Workerse to Mailchannels.Cancelled *.email*.anything.emailCancelled