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Case Studies

How Two Successful Brands Use Litmus to QA, Test, and Stay in the Inbox

Peapod Digital Labs and BoyleSports use Litmus’s suite of tools to personalize, optimize and increase deliverability.

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Ask a Deliverability Expert

Ask a Deliverability Expert: 25 Ways to Keep Your Newsletter Off Blocklists

The best way to deal with a blocklist? Don’t get on one in the first place. Here’s how you can stay off blocklists, out of the spam folder, and in the inbox.

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Best practices

Should I Use Single Opt-In or Double Opt-In For My Newsletter?

Let’s talk about which makes sense for you — and how to keep spammy sign-ups off your email list.

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Ask a Deliverability Expert

Ask a Deliverability Expert: What Does My Email List Say About Me?

A poorly-maintained list can be a dead giveaway that you’re not following best practices. Here are a few things to do to stay out of spam.