Get your newsletter to the inbox — and keep it there

The bulk-sender rules that took effect in February 2024 — SPF, DKIM, DMARC, one-click unsubscribe, and the 0.3% spam-complaint ceiling.

What Google's bulk-sender rules demand of your DMARC setup — the exact DNS record to publish, p=none vs quarantine vs reject, alignment, and a sane rollout path.

How the List-Unsubscribe and List-Unsubscribe-Post headers work, and how to add a compliant one-click flow that mailbox providers trust.

The seven FTC requirements every commercial email must follow, as a working checklist — plus the best practices that keep compliant mail out of the spam folder.

The phrases and formatting signals content filters actually score — categorized and honest about how much words matter next to authentication and reputation.

What Mailchimp, Klaviyo, Kit, MailerLite, Brevo, SendGrid, Postmark, and Amazon SES each add automatically — and the exact setting to flip when they don't.

Google's complete sender rulebook in one place — the baseline every sender must meet, the stricter bulk-sender tier at 5,000 emails a day, and the enforcement timeline.

The automatic Gmail/Yahoo one-click headers, the two-click footer link, the footer you can't delete, suppression lists, and how to exclude contacts from a send.