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Single Opt-In
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 Related Terms
• Double Opt-In
• Opt-In
• Opt-Out
 
 
Definition: A user has subscribed for a newsletter or other email marketing messages by explicitly requesting it. This may happen via email by filling a form on the Web, for example.

Contrary to double opt-in, email addresses submitted to the list are not verified. This makes it possible to sign up somebody without their knowledge and consent.

Related Resources:

Email Marketing Tips, Tricks and Secrets
Make email marketing work for you.

Mac Bulk Email Applications
Email marketing tools for the Mac in review.

Windows Bulk Email Applications
Windows makreting tools in review, too.


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