I want to register users based on my email identifiers on my website, assuming there is one to one between users and their email conversations. But gmail does not recongnize .in email ids . This means that juzerali@gmail.comand juzer.ali@gmail.comare the same users (or email identifiers).
My concern is not only one use case, it can be overcome by simply removing the dotted line. Different email providers may have different policies regarding email aliases and notations.
My question to the community is there any actual rules / guidelines for creating unique users based on their email identifiers as their unique identifiers? Or has someone successfully implemented this before?
NOTES: I checked several websites that register based on the email id. They seem to consider two gmail identifiers with different combinations with .as different email identifiers. This means that the same email account owner can have two accounts on the same site that I want to avoid.
IMPORTANT : Oauth / OpenID is not an option.
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