Re:The Correct Way to Validate Email Addresses
by BuildTheRobots on Thursday September 08, 2016 @09:59AM
(#12453049)
when registering my S3 years ago I realised that samsung wouldn't let you have the word "samsung" or "s3" as part of your email address.
I find common culprits are service companies; gas, electricity, real estate websites, insurance companies etc.
EDIT: Oh, and warranties! Man warranty websites tend to suck. Samsung for instance won't let you register your product to an email with a +.