Double Opt-In helps you

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Marketing communications should be double opt in. When someone subscribes, send them an email to confirm. That does two things…

The poor bastard with a common word on a popular mail host as their email address doesn’t get accidentally subscribed to hundreds of email lists when someone incorrectly types their email in a web form.

The woman who wanted to subscribe to the list, when she doesn’t get the confirmation right away, will realize there’s something wrong and try again, hopefully netting you a real subscriber you weren’t have gotten already.

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