Email Deliverability Readiness Checker

What Is Email Deliverability?

Email deliverability is whether your emails actually reach the inbox — as opposed to landing in spam, being blocked, or bouncing outright. It's a broader concept than "did the email send," and it's shaped by several factors working together rather than any single setting.

Anyone starting to send email marketing, switching platforms, or troubleshooting low open rates benefits from understanding where their setup currently stands.

Sender Authentication: SPF, DKIM, and DMARC

SPF, DKIM, and DMARC are DNS-based records that let a receiving mail server confirm an email genuinely came from your domain. Requirements vary by provider, sending volume, and message type — Gmail's bulk-sender requirements, for example, call for SPF and DKIM plus a DMARC policy of at least p=none for senders that meet its bulk-sender threshold, while smaller senders and other providers may have different obligations. Missing or misconfigured records are a common, preventable cause of poor deliverability regardless of your specific requirements. This checker asks about these by self-report — it does not check your DNS records directly. Verify your actual setup through your email platform's domain authentication settings and your domain registrar.

Sending Practices

How you send matters as much as what you send. Sudden volume spikes from a new or rarely-used domain, inconsistent sending schedules, and purchased or rented lists are all patterns commonly associated with lower deliverability, even when the content itself is legitimate. Gradually ramping up sending volume and keeping a consistent, expected schedule are widely recommended practices — though no single practice guarantees a particular outcome.

Consent and List Quality

A smaller, engaged list tends to perform better than a larger, stale one, though this is general guidance rather than a guaranteed outcome. Regularly removing invalid addresses and consistently unengaged contacts, and using a clear opt-in process, both help keep bounce rates and spam complaints low.

Content and Unsubscribe

A visible, easy unsubscribe option and honest sender identification are good practice for every sender. On top of that, Gmail and Yahoo's bulk-sender requirements call for one-click unsubscribe support (via List-Unsubscribe headers) for marketing email from senders that meet their bulk-sender thresholds — the exact requirement depends on the provider, your message type, and your sending volume, so check what applies to your specific setup. Misleading subject lines or deceptive sender information increase spam complaints, which directly affects future deliverability.

Monitoring and Engagement

Deliverability isn't a one-time setup — it's an ongoing practice. Regularly checking bounce rates, spam complaint rates, and subscriber engagement helps you catch problems before they damage your sender reputation.