About a year after Gmail launched, commercial services blocked the domain for account registration, in droves. I remember seeing errors about using "free" email

About a year after Gmail launched, commercial services blocked the domain for account registration, in droves. I remember seeing errors about using "free" email services. It hasn't happened yet me in a long time but I also use a wildcard address and a personal domain for most things now. (My gmail account is regularly blocked but that's becaue people assume it's fake and they use it for testing... I get all the spam.)