Some interesting ways to use gmail's address rules

Gmail address mapping

Gmail has some interesting rules that it applies to email addresses. Gmail ignores periods, '.', and all of text after the plus, '+', character up until the '@. Others have written pretty extensively about the situation, I'll try to be brief here.

Using periods to make email addresses easier to read

You can insert periods to make your email address easier to read,

Email sent to		Will go to
John.Doe@gmail.com	->	JohnDoe@gmail.com
j.doe@gmail.com	->	jdoe@gmail.com

Unique email addresses for each site

Using '+' you can use unique email addresses when registering with websites. This can make it easier to figure out who might be selling your email address.

Email sent to		Will go to
JohnDoe+somesite@gmail.com	->	JohnDoe@gmail.com
JohnDoe+anothersite@gmail.com	->	JohnDoe@gmail.com

If spam starts arriving on one of these site specific emails you can be pretty sure about the origin of the email address.

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