Klaviyo deliverability services

Open rates are measured against delivered emails, not sent emails. If 15% of your list is reaching spam folders, those contacts never open, never count, and never show up in your rate. Open rates can look healthy while inbox placement quietly erodes. The audit measures placement directly, not inferred from open data.

SPF and DKIM are necessary but not sufficient. Gmail and Yahoo now require DMARC at enforcement level for bulk senders. Klaviyo also uses its own sending subdomain, which creates a separate authentication path that needs to be configured correctly alongside your root domain setup. Stale sending domain keys, shared IP history, and growing suppression gaps all affect placement independently of your initial authentication setup.

We request Manager-level access to Klaviyo for the duration of the engagement. We also need DNS access or coordination with whoever manages your domain records: usually a 10-minute task with your development team or hosting provider. We document every change before making it, and provide a full change log at close. You can revoke access at any time.

Short-term send volume may be reduced during the IP warm-up phase, which typically lasts 10 to 14 days. During this window, we phase sends to engaged segments first, which protects your reputation and usually improves open rates even mid-warm-up. The first clean campaign after warm-up typically shows the strongest placement performance we measure for that account.

Content and design do affect spam filtering: heavy image-to-text ratios, certain HTML patterns, and specific word clusters all influence placement. Our audit includes a content hygiene review. If we find that content is the primary driver, we document it clearly in the findings and can scope content optimisation as a separate workstream. You will not receive a deliverability fix recommendation when the real issue is copy.