Strings do too many things
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Strings do too many things
https://buttondown.email/hillelwayne/archive/strings-do-too-many-things/
The most powerful and terrible of all basis types
https://buttondown.email/hillelwayne/archive/strings-do-too-many-things/
The most powerful and terrible of all basis types
disallow list of known bad email providers.
Imagine giving someone your phone number, and having them say you have to get a different one because they don't like some of the digits in it.
I have seen this nonsense more times than I care to remember. Please don't build systems this way.
If you're trying to do bot detection or the like, use a different approach. Blacklisting email addresses based on domain or any other pattern does a poor job of it and creates an awful user experience.
(And if it prevents people from using spam-fighting tools like forwarding services, then it's directly user-hostile, and makes the world a worse place.)