Something something http://[2607:f8b0:4004:c09::8a] and http://3627734062 are valid url’s without a dot, and are probably valid for emails too, but I’m too lazy to actually verify that.
Even that would be technically incorrect. I believe you could put an A record on a TLD if you wanted. In theory, my email could be me@example.
Another hole to poke in the single dot regex: I could put in fake@com. with a dot trailing after the TLD, which would satisfy “dot after @” but is not an address to my knowledge.
drathvedro@lemm.ee 1 year ago
douglasg14b@lemmy.world 1 year ago
And this sort of thing is exactly how you end up with bad regex that invalidates valid emails.
The point isn’t to invalidate all bad emails. It’s to sort out most of them.