I always assumed they did this because they DON'T want you to be able to filter their spam email or know who they sold your email address to. It may be a bit c

I always assumed they did this because they DON'T want you to be able to filter their spam email or know who they sold your email address to. It may be a bit cynical to call the entirety of the internet a shallow money trench intended to put plastic marketing messages in front of increasingly jaded digital natives. But there are a lot of companies that behave that way. To make things more annoying, I once had an email address that had a three-level domain, think me@email.example.com instead of a domain with two components like me@example.com. I found more than one email validator that insisted that this was illegal.