Registraion Not Sending Activation Email.

Guys thanks for reading this thread.

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I am having problem on my registration. It doesn't send any activation email.

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Help is very much appreciated.

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Url: http://www.aux-3.net

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Thank you so much in advance.

By the way guys I am using the 6.1.4 version. And also can anyone tell me where I can find the SMTP settings?

Thanks in advance.