How to remove duplicate email addresses

Is there a way to reliably get a unique email address from one entered from a user? The problem is in services such as GMail, which allow you to specify a period in the address and delete it, while with other services this is not so.

GMail:

chad.moran@gmail.com
c..hadmoran@gmail.com
c.h.a.d.m.o.r.a.n@gmail.com

They are all the same

Other service:

chad.moran@---.com
c..hadmoran@---.com

They are unique.

Besides special logic, specially for GMail, is there a better way?

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2 answers

Each email server will have different rules about what is and are not allowed. You indicated that you do not want to have a specific logic for each client, and for this reason you must have a specific logic.

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