David Schwartz
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 Jul26 comment Default Gravatar on wildcard email addresses unless specified @DanAtkinson How would the sender get the domain gravatar if they didn't send the hash of the domain? Jul25 comment Default Gravatar on wildcard email addresses unless specified @DanAtkinson If you can try to guess the domain and full email address separately, many email addresses become guessable. Consider an email like mine -- `donald@ripple.com`. I doubt you'd get that by brute force. But if you pre-hashed the top few million domains, you'd get the `ripple.com` part. Then if you tried common first names and last names in combination, you'd get the whole thing. Feb25 comment Is WolframAlpha doing Math wrong? @x_puma_x Making the reason question -- why doesn't it in this particular case? Feb25 comment Is WolframAlpha doing Math wrong? It's dangerous to guess, but it's a reasonable inference that it does so in at least some cases. Feb25 comment Is WolframAlpha doing Math wrong? The problem is more likely with 31833823703921105000. Feb25 comment Is WolframAlpha doing Math wrong? There is nothing special about where the decimal point is. Numbers on one side of the decimal point are not different from numbers on the other side of the decimal point. Feb24 answered Is WolframAlpha doing Math wrong? Jan6 awarded Enlightened Jan6 awarded Nice Answer Dec25 awarded Yearling Jan31 awarded Editor Jan31 awarded Teacher Jan31 revised Default Gravatar on wildcard email addresses unless specified added 2 characters in body Jan31 answered Default Gravatar on wildcard email addresses unless specified Oct10 comment Do email services send sender's IP address? @user121032: The sender's IP address is included; however, what is considered the "sender" depends on the service. Gmail considers its server to be the sender. Hotmail considers the user to be the sender. Aug30 comment Why is Google not accepting my phone number? Try `+(1)(533)(90XXXXX)`. You are halfway between two formats. Dec18 awarded Autobiographer