Glossary · Marketing, CRM & Growth
Email Deliverability
Overview
What email deliverability really means
Email deliverability measures how reliably your messages land in the inbox. It differs from delivery rate: an email can be accepted by a mailbox provider yet still filtered into spam. Providers like Gmail and Outlook score every sender on reputation, authentication, and how recipients engage before deciding where a message lands — so being sent is not the same as being seen.
What controls whether you reach the inbox
Three records prove you are who you claim to be: SPF authorizes your sending servers, DKIM signs messages cryptographically, and DMARC tells providers what to do with failures. Beyond authentication, deliverability rides on list hygiene, low spam-complaint and bounce rates, consistent sending volume, and genuine engagement like opens and replies. Weakness in any one of these drags placement down.
Fixing deliverability in real campaigns
When emails stop converting, the cause is often technical, not creative. A full-service team audits your domain records, warms up sending domains, prunes dead addresses, and configures platforms like Klaviyo, Mailchimp, HubSpot, or your CRM correctly. Dedicated email deliverability and email marketing work keeps sender reputation high so nurture sequences and promotions actually get seen instead of silently filtered.
Where we use it
Related Zen in Tech services
How our team puts Email Deliverability to work in real projects.
FAQ
Email Deliverability — common questions
What is a good email deliverability rate?
Aim for an inbox placement rate above 95% and a bounce rate under 2%. Spam complaints should stay below 0.1%; higher rates signal list or content problems that mailbox providers penalize.
Why are my emails going to spam?
The most common causes are missing or misconfigured SPF, DKIM, and DMARC records, sending to stale or purchased lists, sudden volume spikes, and low engagement. Spam-trigger wording and too many links can also hurt.
How do SPF, DKIM, and DMARC help deliverability?
Together they authenticate your mail so providers trust it came from you and wasn't spoofed. DMARC also adds reporting and a policy, which protects your domain reputation and improves inbox placement over time.
Need Email Deliverability done right?
Book a free consultation and we’ll map the fastest, most cost-effective path for your project.
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