What is double opt-in vs single opt-in? A Plain-English Guide
Double opt-in asks subscribers to confirm via a click after signing up; single opt-in does not. Double opt-in produces cleaner lists, fewer spam traps and better long-term deliverability.
Why it matters for deliverability
Understanding double opt-in vs single opt-in is part of building a list that lands. Get it right and more of your mail reaches the inbox; get it wrong and even legitimate mail can be filtered.
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How Rainmail helps
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