Not all mail servers treat a+b@a.com and a@a.com as the same email.
By equal token, you can't be sure that the email address doesn't actually just contain a plus sign.
I was disappointed to find out at work recently that the plus convention was not configured. It made testing account signups more difficult. This is when I dug in a bit and found it that it depends in the mail server for whether those are unique addresses or not.
By equal token, you can't be sure that the email address doesn't actually just contain a plus sign.
I was disappointed to find out at work recently that the plus convention was not configured. It made testing account signups more difficult. This is when I dug in a bit and found it that it depends in the mail server for whether those are unique addresses or not.