Gmail name program

OK basically I want to make a program where I type in something like [email protected] and it will output all the possibilities of a Gmail name because you can add dots anywhere and itll still work. For example:

[email protected]
[email protected]
[email protected]
[email protected]
[email protected]

Basically the dots can be in anyway except touching the "@" sign. I know how to make a loop and put the dot behind each letter but I am not sure on how to go about getting the other possibilities. Any suggestions?

Quote:

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[email protected]

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What is the number of maximum dots before, between or after a letter?

There can only be one dot between the characters, sorry I was wrong. However, you can have multiple dots per email like:
b.o.bby@gmail or b.obby@gmail or b.o.b.b.y@gmail

Is anybody able to help?