Using subject lines like "Verify your active status" can lift open rates by 27-31% for contacts who haven't engaged in over a year. While effective for reactivation, this slightly gimmicky approach will also annoy some users, leading to a higher-than-usual unsubscribe rate and negative replies, which requires 'thick skin'.

The use of double opt-in email confirmations has fallen 45% year-over-year. Contrary to conventional wisdom, this practice often creates a poor user experience and can lead to higher spam complaint ratios, as the highly-engaged users who confirm are more sensitive to email frequency and content.

Automatically enrolling your entire list into a high-frequency email series (opt-out) instead of requiring an explicit opt-in harms engagement. Subscribers who actively opt-in are more excited about the content and significantly more likely to share it, leading to better referral growth.

A 27% year-over-year drop in "work email only" form requirements isn't just about reducing friction. It's a strategic move, as personal emails yield higher match rates for ad retargeting and allowing access to job seekers builds brand loyalty, turning them into customers when they find new roles.

Marketers are often too afraid of unsubscribes to use aggressive tactics. However, the substantial conversion lift from a high-frequency campaign (like two emails in one day) far outweighs the loss of a few overly sensitive people on your list. Don't let fear of opt-outs dictate strategy.

Don't fear unsubscribes. If no one is leaving your email list, your content is likely too generic and not pushing boundaries. Having people opt-out is a healthy sign that you are polarizing enough to attract a dedicated following while repelling those who aren't a good fit for your brand.

An unsubscribe indicates that a recipient opened and clicked your email, which are positive engagement signals for email providers. Making it difficult for users to unsubscribe is more harmful, as frustrated recipients will mark your email as spam, which severely damages your sender reputation.

Present users with a confirmation email that looks and feels like a standard double opt-in. However, they are already subscribed. This encourages the high-intent action of clicking a confirmation link without losing subscribers who fail to complete the step.

A common tactic to improve lead quality is blocking personal email signups (e.g., Gmail). However, for SignWell, this test resulted in a 30% drop in signups that directly correlated with a 30% drop in paid conversions. This shows that such friction doesn't just filter out low-quality leads; it can remove a large number of legitimate, paying customers.