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List cleaning and deliverability is the work of keeping your emails landing in the inbox instead of spam or the promotions abyss. We prune the dead weight from your list, fix the technical setup that mailbox providers check, and manage how you send so your reputation stays healthy. It is unglamorous, and it is the reason your campaigns get seen at all. The best email in the world earns nothing if it never reaches the inbox.

Deliverability has two halves: the list and the plumbing. We work both.

What’s involved

  • Authentication: setting up SPF, DKIM, and DMARC and using a dedicated sending domain so providers trust you.
  • List hygiene: suppressing hard bounces, removing addresses that have not engaged in a long time, and catching spam traps before they hurt you.
  • Sunset rules in Klaviyo that automatically stop mailing people who have gone fully cold.
  • Re-engagement campaigns to win back the unengaged before we suppress them, so you don’t throw away salvageable contacts.
  • Monitoring spam complaints, bounce rates, and inbox placement, and adjusting sending when the signals slip.

Here is the part people don’t like to hear: a smaller, engaged list almost always outperforms a big, stale one. Mailbox providers reward senders whose recipients open and click, and they punish senders who mail everyone. Cutting addresses that never engage feels like going backwards. It is the opposite. It is what protects the inbox placement of every email you send after.

If your open rates have been sliding or campaigns suddenly stopped performing, this is usually the first place to look, before you touch the copy or the offer.

We do this inside Klaviyo, pruning unengaged profiles and setting up the authentication (SPF, DKIM, DMARC) that keeps you out of spam.

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