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Re:I couldn't buy a car because my email address was 'invalid' by dsign on Monday July 27, 2020 @01:08PM (#23967074)
I have seen this "problem" before. But I'm pretty sure rejecting the '+' sign is so that you have to swallow the spam when it eventually comes.
Re:I couldn't buy a car because my email address was 'invalid' by gruez on Monday July 27, 2020 @02:10PM (#23967767)
If you know about this trick and you want to harvest as much email addresses for spam as possible, wouldn't it make more sense to accept pluses in email addresses, and then strip them out later? It seems far more likely that it's because it's unintentional, due to poor programming.
Re:I couldn't buy a car because my email address was 'invalid' by dsign on Monday July 27, 2020 @04:50PM (#23969233)
Not if using/selling the email address you provide is according to the ToS of the seller. Then they can legally spam [email protected] but not [email protected], which is a huge downer.